43 results on '"Tudor-Locke, Catrine"'
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2. Correction: Cadence (steps/min) and relative intensity in 21 to 60-year-olds: the CADENCE-adults study
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McAvoy, Cayla R., Moore, Christopher C., Aguiar, Elroy J., Ducharme, Scott W., Schuna, Jr, John M., Barreira, Tiago V., Chase, Colleen J., Gould, Zachary R., Amalbert-Birriel, Marcos A., Chipkin, Stuart R., Staudenmayer, John, Tudor-Locke, Catrine, and Mora-Gonzalez, Jose
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- 2022
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3. A catalog of validity indices for step counting wearable technologies during treadmill walking: the CADENCE-adults study
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Mora-Gonzalez, Jose, Gould, Zachary R., Moore, Christopher C., Aguiar, Elroy J., Ducharme, Scott W., Schuna, Jr, John M., Barreira, Tiago V., Staudenmayer, John, McAvoy, Cayla R., Boikova, Mariya, Miller, Taavy A., and Tudor-Locke, Catrine
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- 2022
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4. Walking cadence (steps/min) and intensity in 61–85-year-old adults: the CADENCE-Adults study
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Tudor-Locke, Catrine, Mora-Gonzalez, Jose, Ducharme, Scott W., Aguiar, Elroy J., Schuna, Jr., John M., Barreira, Tiago V., Moore, Christopher C., Chase, Colleen J., Gould, Zachary R., Amalbert-Birriel, Marcos A., Chipkin, Stuart R., and Staudenmayer, John
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- 2021
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5. Cadence (steps/min) and relative intensity in 21 to 60-year-olds: the CADENCE-adults study
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McAvoy, Cayla R., Moore, Christopher C., Aguiar, Elroy J., Ducharme, Scott W., Schuna, Jr, John M., Barreira, Tiago V., Chase, Colleen J., Gould, Zachary R., Amalbert-Birriel, Marcos A., Chipkin, Stuart R., Staudenmayer, John, Tudor-Locke, Catrine, and Mora-Gonzalez, Jose
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- 2021
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6. Walking cadence (steps/min) and intensity in 41 to 60-year-old adults: the CADENCE-adults study
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Tudor-Locke, Catrine, Ducharme, Scott W., Aguiar, Elroy J., Schuna, Jr, John M., Barreira, Tiago V., Moore, Christopher C., Chase, Colleen J., Gould, Zachary R., Amalbert-Birriel, Marcos A., Mora-Gonzalez, Jose, Chipkin, Stuart R., and Staudenmayer, John
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- 2020
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7. Walking cadence (steps/min) and intensity in 21–40 year olds: CADENCE-adults
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Tudor-Locke, Catrine, Aguiar, Elroy J., Han, Ho, Ducharme, Scott W., Schuna, Jr, John M., Barreira, Tiago V., Moore, Christopher C., Busa, Michael A., Lim, Jongil, Sirard, John R., Chipkin, Stuart R., and Staudenmayer, John
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- 2019
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8. Standardised criteria for classifying the International Classification of Activities for Time-use Statistics (ICATUS) activity groups into sleep, sedentary behaviour, and physical activity
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Liangruenrom, Nucharapon, Craike, Melinda, Dumuid, Dorothea, Biddle, Stuart J. H., Tudor-Locke, Catrine, Ainsworth, Barbara, Jalayondeja, Chutima, van Tienoven, Theun Pieter, Lachapelle, Ugo, Weenas, Djiwo, Berrigan, David, Olds, Timothy, and Pedisic, Zeljko
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- 2019
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9. Cadence (steps/min) and intensity during ambulation in 6–20 year olds: the CADENCE-kids study
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Tudor-Locke, Catrine, Schuna, Jr, John M., Han, Ho, Aguiar, Elroy J., Larrivee, Sandra, Hsia, Daniel S., Ducharme, Scott W., Barreira, Tiago V., and Johnson, William D.
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- 2018
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10. A catalog of validity indices for step counting wearable technologies during treadmill walking: the CADENCE-Kids study
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Gould, Zachary R., primary, Mora-Gonzalez, Jose, additional, Aguiar, Elroy J., additional, Schuna, John M., additional, Barreira, Tiago V., additional, Moore, Christopher C., additional, Staudenmayer, John, additional, and Tudor-Locke, Catrine, additional
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- 2021
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11. Pedometer determined physical activity tracks in African American adults: The Jackson Heart Study
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Newton Robert L, M Hongmei, Dubbert Patricia M, Johnson William D, Hickson DeMarc A, Ainsworth Barbara, Carithers Teresa, Taylor Herman, Wyatt Sharon, and Tudor-Locke Catrine
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Physical activity assessment ,African Americans ,Sedentary ,Validity ,Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background This study investigated the number of pedometer assessment occasions required to establish habitual physical activity in African American adults. Methods African American adults (mean age 59.9 ± 0.60 years; 59 % female) enrolled in the Diet and Physical Activity Substudy of the Jackson Heart Study wore Yamax pedometers during 3-day monitoring periods, assessed on two to three distinct occasions, each separated by approximately one month. The stability of pedometer measured PA was described as differences in mean steps/day across time, as intraclass correlation coefficients (ICC) by sex, age, and body mass index (BMI) category, and as percent of participants changing steps/day quartiles across time. Results Valid data were obtained for 270 participants on either two or three different assessment occasions. Mean steps/day were not significantly different across assessment occasions (p values > 0.456). The overall ICCs for steps/day assessed on either two or three occasions were 0.57 and 0.76, respectively. In addition, 85 % (two assessment occasions) and 76 % (three assessment occasions) of all participants remained in the same steps/day quartile or changed one quartile over time. Conclusion The current study shows that an overall mean steps/day estimate based on a 3-day monitoring period did not differ significantly over 4 – 6 months. The findings were robust to differences in sex, age, and BMI categories. A single 3-day monitoring period is sufficient to capture habitual physical activity in African American adults.
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- 2012
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12. Mediators of physical activity change in a behavioral modification program for type 2 diabetes patients
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Tudor-Locke Catrine E, Ruige Johannes, Deforche Benedicte, De Greef Karlijn, Van Dyck Delfien, Kaufman Jean-Marc, Owen Neville, and De Bourdeaudhuij Ilse
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Many studies have reported significant behavioral impact of physical activity interventions. However, few have examined changes in potential mediators of change preceding behavioral changes, resulting in a lack of information concerning how the intervention worked. Our purpose was to examine mediation effects of changes in psychosocial variables on changes in physical activity in type 2 diabetes patients. Methods Ninety-two patients (62 ± 9 years, 30, 0 ± 2.5 kg/m2, 69% males) participated in a randomized controlled trial. The 24-week intervention was based on social-cognitive constructs and consisted of a face-to-face session, telephone follow-ups, and the use of a pedometer. Social-cognitive variables and physical activity (device-based and self-reported) were collected at baseline, after the 24-week intervention and at one year post-baseline. PA was measured by pedometer, accelerometer and questionnaire. Results Post-intervention physical activity changes were mediated by coping with relapse, changes in social norm, and social modeling from family members (p ≤ 0.05). One-year physical activity changes were mediated by coping with relapse, changes in social support from family and self-efficacy towards physical activity barriers (p ≤ 0.05) Conclusions For patients with type 2 diabetes, initiatives to increase their physical activity could usefully focus on strategies for resuming regular patterns of activity, on engaging family social support and on building confidence about dealing with actual and perceived barriers to activity. Trial Registration NCT00903500, ClinicalTrials.gov.
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- 2011
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13. How many steps/day are enough? For older adults and special populations
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Tudor-Locke Catrine, Craig Cora L, Aoyagi Yukitoshi, Bell Rhonda C, Croteau Karen A, De Bourdeaudhuij Ilse, Ewald Ben, Gardner Andrew W, Hatano Yoshiro, Lutes Lesley D, Matsudo Sandra M, Ramirez-Marrero Farah A, Rogers Laura Q, Rowe David A, Schmidt Michael D, Tully Mark A, and Blair Steven N
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Older adults and special populations (living with disability and/or chronic illness that may limit mobility and/or physical endurance) can benefit from practicing a more physically active lifestyle, typically by increasing ambulatory activity. Step counting devices (accelerometers and pedometers) offer an opportunity to monitor daily ambulatory activity; however, an appropriate translation of public health guidelines in terms of steps/day is unknown. Therefore this review was conducted to translate public health recommendations in terms of steps/day. Normative data indicates that 1) healthy older adults average 2,000-9,000 steps/day, and 2) special populations average 1,200-8,800 steps/day. Pedometer-based interventions in older adults and special populations elicit a weighted increase of approximately 775 steps/day (or an effect size of 0.26) and 2,215 steps/day (or an effect size of 0.67), respectively. There is no evidence to inform a moderate intensity cadence (i.e., steps/minute) in older adults at this time. However, using the adult cadence of 100 steps/minute to demark the lower end of an absolutely-defined moderate intensity (i.e., 3 METs), and multiplying this by 30 minutes produces a reasonable heuristic (i.e., guiding) value of 3,000 steps. However, this cadence may be unattainable in some frail/diseased populations. Regardless, to truly translate public health guidelines, these steps should be taken over and above activities performed in the course of daily living, be of at least moderate intensity accumulated in minimally 10 minute bouts, and add up to at least 150 minutes over the week. Considering a daily background of 5,000 steps/day (which may actually be too high for some older adults and/or special populations), a computed translation approximates 8,000 steps on days that include a target of achieving 30 minutes of moderate-to-vigorous physical activity (MVPA), and approximately 7,100 steps/day if averaged over a week. Measured directly and including these background activities, the evidence suggests that 30 minutes of daily MVPA accumulated in addition to habitual daily activities in healthy older adults is equivalent to taking approximately 7,000-10,000 steps/day. Those living with disability and/or chronic illness (that limits mobility and or/physical endurance) display lower levels of background daily activity, and this will affect whole-day estimates of recommended physical activity.
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- 2011
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14. How many steps/day are enough? for adults
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Rowe David A, Oppert Jean-Michel, Mutrie Nanette, Matsudo Sandra M, Inoue Shigeru, Hatano Yoshiro, Giles-Corti Billie, De Cocker Katrien, Clemes Stacy A, Brown Wendy J, Craig Cora L, Tudor-Locke Catrine, Schmidt Michael D, Schofield Grant M, Spence John C, Teixeira Pedro J, Tully Mark A, and Blair Steven N
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Physical activity guidelines from around the world are typically expressed in terms of frequency, duration, and intensity parameters. Objective monitoring using pedometers and accelerometers offers a new opportunity to measure and communicate physical activity in terms of steps/day. Various step-based versions or translations of physical activity guidelines are emerging, reflecting public interest in such guidance. However, there appears to be a wide discrepancy in the exact values that are being communicated. It makes sense that step-based recommendations should be harmonious with existing evidence-based public health guidelines that recognize that "some physical activity is better than none" while maintaining a focus on time spent in moderate-to-vigorous physical activity (MVPA). Thus, the purpose of this review was to update our existing knowledge of "How many steps/day are enough?", and to inform step-based recommendations consistent with current physical activity guidelines. Normative data indicate that healthy adults typically take between 4,000 and 18,000 steps/day, and that 10,000 steps/day is reasonable for this population, although there are notable "low active populations." Interventions demonstrate incremental increases on the order of 2,000-2,500 steps/day. The results of seven different controlled studies demonstrate that there is a strong relationship between cadence and intensity. Further, despite some inter-individual variation, 100 steps/minute represents a reasonable floor value indicative of moderate intensity walking. Multiplying this cadence by 30 minutes (i.e., typical of a daily recommendation) produces a minimum of 3,000 steps that is best used as a heuristic (i.e., guiding) value, but these steps must be taken over and above habitual activity levels to be a true expression of free-living steps/day that also includes recommendations for minimal amounts of time in MVPA. Computed steps/day translations of time in MVPA that also include estimates of habitual activity levels equate to 7,100 to 11,000 steps/day. A direct estimate of minimal amounts of MVPA accumulated in the course of objectively monitored free-living behaviour is 7,000-8,000 steps/day. A scale that spans a wide range of incremental increases in steps/day and is congruent with public health recognition that "some physical activity is better than none," yet still incorporates step-based translations of recommended amounts of time in MVPA may be useful in research and practice. The full range of users (researchers to practitioners to the general public) of objective monitoring instruments that provide step-based outputs require good reference data and evidence-based recommendations to be able to design effective health messages congruent with public health physical activity guidelines, guide behaviour change, and ultimately measure, track, and interpret steps/day.
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- 2011
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15. How many steps/day are enough? for children and adolescents
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Tudor-Locke Catrine, Craig Cora L, Beets Michael W, Belton Sarahjane, Cardon Greet M, Duncan Scott, Hatano Yoshiro, Lubans David R, Olds Timothy S, Raustorp Anders, Rowe David A, Spence John C, Tanaka Shigeho, and Blair Steven N
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Worldwide, public health physical activity guidelines include special emphasis on populations of children (typically 6-11 years) and adolescents (typically 12-19 years). Existing guidelines are commonly expressed in terms of frequency, time, and intensity of behaviour. However, the simple step output from both accelerometers and pedometers is gaining increased credibility in research and practice as a reasonable approximation of daily ambulatory physical activity volume. Therefore, the purpose of this article is to review existing child and adolescent objectively monitored step-defined physical activity literature to provide researchers, practitioners, and lay people who use accelerometers and pedometers with evidence-based translations of these public health guidelines in terms of steps/day. In terms of normative data (i.e., expected values), the updated international literature indicates that we can expect 1) among children, boys to average 12,000 to 16,000 steps/day and girls to average 10,000 to 13,000 steps/day; and, 2) adolescents to steadily decrease steps/day until approximately 8,000-9,000 steps/day are observed in 18-year olds. Controlled studies of cadence show that continuous MVPA walking produces 3,300-3,500 steps in 30 minutes or 6,600-7,000 steps in 60 minutes in 10-15 year olds. Limited evidence suggests that a total daily physical activity volume of 10,000-14,000 steps/day is associated with 60-100 minutes of MVPA in preschool children (approximately 4-6 years of age). Across studies, 60 minutes of MVPA in primary/elementary school children appears to be achieved, on average, within a total volume of 13,000 to 15,000 steps/day in boys and 11,000 to 12,000 steps/day in girls. For adolescents (both boys and girls), 10,000 to 11,700 may be associated with 60 minutes of MVPA. Translations of time- and intensity-based guidelines may be higher than existing normative data (e.g., in adolescents) and therefore will be more difficult to achieve (but not impossible nor contraindicated). Recommendations are preliminary and further research is needed to confirm and extend values for measured cadences, associated speeds, and MET values in young people; continue to accumulate normative data (expected values) for both steps/day and MVPA across ages and populations; and, conduct longitudinal and intervention studies in children and adolescents required to inform the shape of step-defined physical activity dose-response curves associated with various health parameters.
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- 2011
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16. Canadian children's and youth's pedometer-determined steps/day, parent-reported TV watching time, and overweight/obesity: The CANPLAY Surveillance Study
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Craig Cora L, Tudor-Locke Catrine, Cameron Christine, and Griffiths Joseph M
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background This study examines associations between pedometer-determined steps/day and parent-reported child's Body Mass Index (BMI) and time typically spent watching television between school and dinner. Methods Young people (aged 5-19 years) were recruited through their parents by random digit dialling and mailed a data collection package. Information on height and weight and time spent watching television between school and dinner on a typical school day was collected from parents. In total, 5949 boys and 5709 girls reported daily steps. BMI was categorized as overweight or obese using Cole's cut points. Participants wore pedometers for 7 days and logged daily steps. The odds of being overweight and obese by steps/day and parent-reported time spent television watching were estimated using logistic regression for complex samples. Results Girls had a lower median steps/day (10682 versus 11059 for boys) and also a narrower variation in steps/day (interquartile range, 4410 versus 5309 for boys). 11% of children aged 5-19 years were classified as obese; 17% of boys and girls were overweight. Both boys and girls watched, on average, < 40 minutes of television between school and dinner on school days. Adjusting for child's age and sex and parental education, the odds of a child being obese decreased by 20% for every extra 3000 steps/day and increased by 21% for every 30 minutes of television watching. There was no association of being overweight with steps/day, however the odds of being overweight increased by 8% for every 30 minutes of additional time spent watching television between school and dinner on a typical school day. Discussion Television viewing is the more prominent factor in terms of predicting overweight, and it contributes to obesity, but steps/day attenuates the association between television viewing and obesity, and therefore can be considered protective against obesity. In addition to replacing opportunities for active alternative behaviours, exposure to television might also impact body weight by promoting excess energy intake. Conclusions In this large nationally representative sample, pedometer-determined steps/day was associated with reduced odds of being obese (but not overweight) whereas each parent-reported hour spent watching television between school and dinner increased the odds of both overweight and obesity.
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- 2011
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17. Accelerometer profiles of physical activity and inactivity in normal weight, overweight, and obese U.S. men and women
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Johnson William D, Brashear Meghan M, Tudor-Locke Catrine, and Katzmarzyk Peter T
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The 2005-2006 National Health and Nutrition Examination Survey (NHANES) is used to describe an accelerometer-derived physical activity/inactivity profile in normal weight (BMI < 25 kg/m2), overweight (25 ≤ BMI < 30 kg/m2), and obese (BMI ≥ 30 kg/m2) U.S. adults. Methods We computed physical activity volume indicators (activity counts/day, uncensored and censored steps/day), rate indicators (e.g., steps/minute), time indicators (employing NHANES activity counts/minute cut points to infer time in non-wear, sedentary, low, light, moderate, and vigorous intensities), the number of breaks in sedentary time (occasions when activity counts rose from < 100 activity/counts in one minute to ≥ 100 activity counts in the subsequent minute), achievement of public health guidelines, and classification by step-defined physical activity levels. Data were examined for evidence of consistent and significant gradients across BMI-defined categories. Results In 2005-2006, U.S adults averaged 6,564 ± SE 107 censored steps/day, and after considering non-wear time, they spent approximately 56.8% of the rest of the waking day in sedentary time, 23.7% in low intensity, 16.7% in light intensity, 2.6% in moderate intensity, and 0.2% in vigorous intensity. Overall, approximately 3.2% of U.S. adults achieved public health guidelines. The normal weight category took 7,190 ± SE 157 steps/day, and spent 25.7 ± 0.9 minutes/day in moderate intensity and 7.3 ± 0.4 minutes/day in vigorous intensity physical activity. The corresponding numbers for the overweight category were 6,879 ± 140 steps/day, 25.3 ± 0.9 minutes/day, and 5.3 ± 0.5 minutes/day and for the obese category 5,784 ± 124 steps/day, 17.3 ± 0.7 minutes/day and 3.2 ± 0.4 minutes/day. Across BMI categories, increasing gradients and significant trends were apparent in males for sedentary time and decreasing gradients and significant trends were evident in time spent in light intensity, moderate intensity, and vigorous intensity. For females, there were only consistent gradients and significant trends apparent for decreasing amounts of time spent in moderate and vigorous intensity. Conclusions Simple indicators of physical activity volume (i.e., steps/day) and time in light, moderate or vigorous intensity physical activity differ across BMI categories for both sexes, suggesting that these should continue to be targets for surveillance.
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- 2010
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18. Correction: Expected values for pedometer-determined physical activity in older populations
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Hart Teresa L, Tudor-Locke Catrine, and Washington Tracy L
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Correction to Tudor-Locke C, Hart TL, Washington TL: Expected values for pedometer-determined physical activity in older populations. International Journal of Behavioral Nutrition and Physical Activity 2009, 6:59
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- 2009
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19. Expected values for pedometer-determined physical activity in older populations
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Hart Teresa L, Tudor-Locke Catrine, and Washington Tracy L
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract The purpose of this review is to update expected values for pedometer-determined physical activity in free-living healthy older populations. A search of the literature published since 2001 began with a keyword (pedometer, "step counter," "step activity monitor" or "accelerometer AND steps/day") search of PubMed, Cumulative Index to Nursing & Allied Health Literature (CINAHL), SportDiscus, and PsychInfo. An iterative process was then undertaken to abstract and verify studies of pedometer-determined physical activity (captured in terms of steps taken; distance only was not accepted) in free-living adult populations described as ≥ 50 years of age (studies that included samples which spanned this threshold were not included unless they provided at least some appropriately age-stratified data) and not specifically recruited based on any chronic disease or disability. We identified 28 studies representing at least 1,343 males and 3,098 females ranging in age from 50–94 years. Eighteen (or 64%) of the studies clearly identified using a Yamax pedometer model. Monitoring frames ranged from 3 days to 1 year; the modal length of time was 7 days (17 studies, or 61%). Mean pedometer-determined physical activity ranged from 2,015 steps/day to 8,938 steps/day. In those studies reporting such data, consistent patterns emerged: males generally took more steps/day than similarly aged females, steps/day decreased across study-specific age groupings, and BMI-defined normal weight individuals took more steps/day than overweight/obese older adults. The range of 2,000–9,000 steps/day likely reflects the true variability of physical activity behaviors in older populations. More explicit patterns, for example sex- and age-specific relationships, remain to be informed by future research endeavors.
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- 2009
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20. Tracking of pedometer-determined physical activity in adults who relocate: results from RESIDE
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McCormack Gavin, Knuiman Matthew, Giles-Corti Billie, and Tudor-Locke Catrine
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background This secondary analysis investigated the extent and pattern of one-year tracking of pedometer-determined physical activity in people who relocated within the same metropolitan area (T1: baseline and T2: post-relocation). Specifically, data were derived from the RESIDential Environment Project (RESIDE), a natural experiment of people moving into new housing developments. Methods 1,175 participants (491 males, age = 42.6 ± 12.7 years, BMI = 27.2 ± 9.9 kg/m2; 684 females, age = 41.2 ± 11.3 years, BMI = 25.4 ± 5.2 kg/m2) wore a Yamax pedometer (SW-200-024) for seven days during the same season at both time points. Pearson's product-moment and Spearman's rank order correlations were used to evaluate the extent of tracking of mean steps/day. Age categories were set as youngest-29.9 (19 was the youngest in males, 20 in females), 30–39.9, 40–49.9, 50–59.9, and 60-oldest (78 was the oldest in males, 71 in females). Change in steps/day was also described categorically as: 1) stably inactive < 7,500 steps/day; 2) decreased activity (moved from ≥ 7,500 to < 7,500 steps/day between T1 and T2); 3) increased activity (moved from < 7,500 to ≥ 7,500 steps/day between T1 and T2); and, 4) stably active ≥ 7,500 steps/day at both time points. Stratified analyses were used to illuminate patterns by sex, age, and BMI-defined weight categories. Results Overall, there was a small (non-significant) decrease in steps/day between T1 and T2 (mean ± SD is -81 ± 3,090 with 95%CI -259 to 97). With few exceptions (i.e., older women), both Pearson's and Spearman's correlations were moderate (r = 0.30–0.59) to moderately high (r = 0.60–0.70). The relative change/stability in steps/day (cut at 7,500 steps/day) was not significant across age groups in males (χ2 = 17.35, p = .137) but was in females (χ2 = 50.00, p < .0001). In both males and females the differences across BMI categories was significant (χ2 = 22.28, p = .001 and χ2 = 15.70, p = .015, respectively). For both sexes, those in the obese category were more stably inactive (and less stably active) between assessment points compared with those who were categorized as normal weight. Conclusion Despite relocation, Western Australian adults held their rank position to a moderate to moderately high extent over one year. Categorized and expressed as relative stability/change over time, sex, age, and BMI patterns were evident.
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- 2008
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21. Walking behaviours from the 1965–2003 American Heritage Time Use Study (AHTUS)
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Merom Dafna, Fisher Kimberly, Bittman Michael, Bowles Heather R, van der Ploeg Hidde P, Tudor-Locke Catrine, Gershuny Jonathan, Bauman Adrian, and Egerton Muriel
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The American Heritage Time Use Study (AHTUS) represents a harmonised historical data file of time use by adults, amalgamating surveys collected in 1965–66, 1975–76, 1985, 1992–94, and 2003. The objectives of time-use studies have ranged from evaluating household and other unpaid production of goods and services, to monitoring of media use, to comparing lifestyles of more and less privileged social groups, or to tracking broad shifts in social behaviour. The purpose of this paper is to describe the process and utility of identifying and compiling data from the AHTUS to describe a range of walking behaviours collected using time-use survey methods over almost 40 years in the USA. Methods This is a secondary data analysis of an existing amalgamated data set. Noting source survey-specific limitations in comparability of design, we determined age-standardized participation (and associated durations) in any walking, walking for exercise, walking for transport, walking the dog, sports/exercise (excluding walking), and all physical activity for those survey years for which sufficient relevant data details were available. Results Data processing revealed inconsistencies in instrument administration, coding various types of walking and in prompting other sport/exercise across surveys. Thus for the entire period, application of inferential statistics to determine trend for a range of walking behaviours could not be done with confidence. Focusing on the two most comparable survey years, 1985 and 2003, it appears that walking for exercise in America has increased in popularity on any given day (from 2.9 to 5.4% of adults) and accumulated duration amongst those who walk for exercise (from 30 to 45 mins/day). Dog walking has decreased in popularity over the same time period (from 9.4 to 2.6%). Associated duration amongst dog walkers was stable at 30 mins/day. Conclusion The noted and sometimes substantial differences in methods between the various survey administrations preclude stringent interpretation of these trends in walking behaviours and the use of conventional application of inferential statistics to evaluate significance of time trends. Although the AHTUS offers the most comprehensive attempt at harmonization yet undertaken with these individual time-use surveys, we found that any noted cross-time changes in walking and physical activity behaviour are not easily interpreted in terms of conventional epidemiological approaches and could be true changes, artefact related to instrument and method changes, or both. Public health utilization of the AHTUS, could be enhanced with greater attention to methodological issues known to influence estimation of physical activity behaviour in population. This could be achieved with cross-disciplinary collaboration between groups of experts in the various stages of these surveys.
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- 2007
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22. Relationship between objective measures of physical activity and weather: a longitudinal study
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Tudor-Locke Catrine, Ryan Daniel AJ, and Chan Catherine B
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Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Background The weather may be a barrier to physical activity but objective assessment of this hypothesis is lacking. Therefore we evaluated the effect of temperature, rain or snow, and wind speed on the daily physical activity of adults. Methods This report contains data from 25 males (BMI (mean ± SD): 28.7 ± 3.83 kg/m2) and 177 females (BMI: 29.2 ± 5.92 kg/m2) enrolled in an intervention to increase physical activity. Steps/day of the participants was measured by pedometer. Weather data were obtained from Environment Canada. A total of 8,125 observations were included in a mixed linear model analysis. Results Significant weather related variables (at the 5% level) impacting steps/day included: seasonal effects related to the interaction between weekday and month; mean temperature, total rainfall, interactions between gender, BMI and total snow, interactions between maximum wind speed and BMI, and the amount of snow on the ground. The estimated magnitudes for the various effects were modest, ranging from ~1% to ~20%. Thus for an average individual taking ~10,000 steps/day, weather-dependent changes in physical activity could reach 2,000 steps/day. Conclusion We conclude that weather had modest effects on physical activity of participants in an intervention to increase their activity. It should be stressed that these effects may be different for less or more motivated people. With this in mind, we suggest that the effect of weather on physical activity in the general population needs to be objectively assessed to better understand the barrier it poses, especially as it relates to outdoor recreation or work activities.
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- 2006
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23. Patterns of walking for transport and exercise: a novel application of time use data
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Merom Dafna, Bittman Michael, Tudor-Locke Catrine, and Bauman Adrian
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Exercise/physical activity ,surveys ,Nutritional diseases. Deficiency diseases ,RC620-627 ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Walking for exercise is a purposeful or structured activity that can be captured relatively easily in surveys focused on leisure time activity. In contrast, walking for transport is an incidental activity that is likely to be missed using these same assessment approaches. Therefore, the purpose of this analysis was to utilize 1997 Australian Bureau of Statistics (ABS) Time Use Survey diary data to describe nationally representative patterns of walking for transport and for exercise. Methods Household members ≥ 15 years of age were recruited from over 4,550 randomly selected private dwellings in Australia. Time use diaries were collected for two designated days during all four seasons over the calendar year. 3,471 males and 3,776 females (94% household response rate and 84% person response rate) provided 14,315 diary days of data. The raw diary data were coded and summarized into bouts and minutes that included walking for transport and for exercise. Results Walking for transport was indicated on a higher proportion of days compared to walking for exercise (20 vs. 9%). Based on participant sub-samples ('doers'; those actually performing the activity) walking for transport was performed over 2.3 ± 1.4 bouts/day (12.5 minutes/bout) for a total of ≈28 mins/day and walking for exercise over 1.2 ± 0.5 bouts/day (47 minutes/bout) for a total of ≈56 mins/day. Conclusion Although walking for transport is typically undertaken in multiple brief bouts, accumulated durations approximate public health guidelines for those who report any walking for transport.
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- 2005
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24. Classification of occupational activity categories using accelerometry: NHANES 2003–2004
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Steeves, Jeremy A., primary, Tudor-Locke, Catrine, additional, Murphy, Rachel A., additional, King, George A., additional, Fitzhugh, Eugene C., additional, and Harris, Tamara B., additional
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- 2015
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25. Mediating role of television time, diet patterns, physical activity and sleep duration in the association between television in the bedroom and adiposity in 10 year-old children
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Borghese, Michael M, primary, Tremblay, Mark S, additional, Katzmarzyk, Peter T, additional, Tudor-Locke, Catrine, additional, Schuna, John M, additional, Leduc, Geneviève, additional, Boyer, Charles, additional, LeBlanc, Allana G, additional, and Chaput, Jean-Philippe, additional
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- 2015
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26. Adult self-reported and objectively monitored physical activity and sedentary behavior: NHANES 2005–2006
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Schuna, John M, primary, Johnson, William D, additional, and Tudor-Locke, Catrine, additional
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- 2013
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27. Relationship between parent and child pedometer-determined physical activity: a sub-study of the CANPLAY surveillance study
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Craig, Cora L, primary, Cameron, Christine, additional, and Tudor-Locke, Catrine, additional
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- 2013
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28. Steps/day translation of the moderate-to-vigorous physical activity guideline for children and adolescents
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Adams, Marc A, primary, Johnson, William D, additional, and Tudor-Locke, Catrine, additional
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- 2013
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29. Mediators of physical activity change in a behavioral modification program for type 2 diabetes patients
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Van Dyck, Delfien, primary, De Greef, Karlijn, additional, Deforche, Benedicte, additional, Ruige, Johannes, additional, Tudor-Locke, Catrine E, additional, Kaufman, Jean-Marc, additional, Owen, Neville, additional, and De Bourdeaudhuij, Ilse, additional
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- 2011
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30. Canadian children's and youth's pedometer-determined steps/day, parent-reported TV watching time, and overweight/obesity: The CANPLAY Surveillance Study
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Tudor-Locke, Catrine, primary, Craig, Cora L, additional, Cameron, Christine, additional, and Griffiths, Joseph M, additional
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- 2011
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31. How many steps/day are enough? for adults
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Tudor-Locke, Catrine, primary, Craig, Cora L, additional, Brown, Wendy J, additional, Clemes, Stacy A, additional, De Cocker, Katrien, additional, Giles-Corti, Billie, additional, Hatano, Yoshiro, additional, Inoue, Shigeru, additional, Matsudo, Sandra M, additional, Mutrie, Nanette, additional, Oppert, Jean-Michel, additional, Rowe, David A, additional, Schmidt, Michael D, additional, Schofield, Grant M, additional, Spence, John C, additional, Teixeira, Pedro J, additional, Tully, Mark A, additional, and Blair, Steven N, additional
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- 2011
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32. Accelerometer profiles of physical activity and inactivity in normal weight, overweight, and obese U.S. men and women
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Tudor-Locke, Catrine, primary, Brashear, Meghan M, additional, Johnson, William D, additional, and Katzmarzyk, Peter T, additional
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- 2010
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33. Expected values for pedometer-determined physical activity in older populations
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Tudor-Locke, Catrine, primary, Hart, Teresa L, additional, and Washington, Tracy L, additional
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- 2009
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34. Correction: Expected values for pedometer-determined physical activity in older populations
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Tudor-Locke, Catrine, primary, Hart, Teresa L, additional, and Washington, Tracy L, additional
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- 2009
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35. Tracking of pedometer-determined physical activity in adults who relocate: results from RESIDE
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Tudor-Locke, Catrine, primary, Giles-Corti, Billie, additional, Knuiman, Matthew, additional, and McCormack, Gavin, additional
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- 2008
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36. Walking behaviours from the 1965–2003 American Heritage Time Use Study (AHTUS)
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Tudor-Locke, Catrine, primary, van der Ploeg, Hidde P, additional, Bowles, Heather R, additional, Bittman, Michael, additional, Fisher, Kimberly, additional, Merom, Dafna, additional, Gershuny, Jonathan, additional, Bauman, Adrian, additional, and Egerton, Muriel, additional
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- 2007
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37. Relationship between objective measures of physical activity and weather: a longitudinal study
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Chan, Catherine B, primary, Ryan, Daniel AJ, additional, and Tudor-Locke, Catrine, additional
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- 2006
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38. Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study
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Roman-Viñas, Blanca, Chaput, Jean Philippe, Katzmarzyk, Peter T., Fogelholm, Mikael, Lambert, Estelle V., Maher, Carol, Maia, Jose, Olds, Timothy, Onywera, Vincent, Sarmiento, Olga L., Standage, Martyn, Tudor-Locke, Catrine, Tremblay, Mark S., Church, Timothy S., Lambert, Denise G., Barreira, Tiago, Broyles, Stephanie, Butitta, Ben, Champagne, Catherine, Cocreham, Shannon, Denstel, Kara D., Drazba, Katy, Harrington, Deirdre, Johnson, William, Milauskas, Dione, Mire, Emily, Tohme, Allison, Rodarte, Ruben, Amoroso, Bobby, Luopa, John, Neiberg, Rebecca, Rushing, Scott, Lewis, Lucy, Ferrar, Katia, Georgiadis, Effie, Stanley, Rebecca, Matsudo, Victor Keihan Rodrigues, Matsudo, Sandra, Araujo, Timoteo, de Oliveira, Luis Carlos, Fabiano, Luis, Bezerra, Diogo, Ferrari, Gerson, Bélanger, Priscilla, Borghese, Mike, Boyer, Charles, LeBlanc, Allana, Francis, Claire, Leduc, Geneviève, Wang, Yue, for the ISCOLE Research Group, Department of Food and Nutrition, Nutrition Science, Department of Human Biology, Faculty of Health Sciences, Roman-Viñas, Blanca, Chaput, Jean-Philippe, Katzmarzyk, Peter T, Fogelholm, Mikael, Lambert, Estelle V, Maher, Carol, Maia, Jose, Olds, Timothy, Onywera, Vincent, Sarmiento, Olga L, Standage, Martyn, Tudor-Locke, Catrine, Tremblay, Mark S, and MRC/UCT RU for Exercise and Sport Medicine
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Male ,Gerontology ,obesity ,Pediatric Obesity ,Cross-sectional study ,RJ101 ,physical activity ,Medicine (miscellaneous) ,RA773 ,Recommendations ,Body Mass Index ,0302 clinical medicine ,Accelerometry ,Odds Ratio ,Prevalence ,030212 general & internal medicine ,Child ,Children ,Adiposity ,2. Zero hunger ,Nutrition and Dietetics ,SEDENTARY BEHAVIOR ,HEALTH INDICATORS ,3142 Public health care science, environmental and occupational health ,3. Good health ,TIME ,YOUTH ,screen time ,Sedentary Lifestyle ,SLEEP DURATION ,Female ,LIFE-STYLE ,SCHOOL-AGED CHILDREN ,CHILDHOOD OBESITY ,ENERGY-PROJECT ,Canada ,prevalence ,Guidelines as Topic ,Physical Therapy, Sports Therapy and Rehabilitation ,Clinical nutrition ,Childhood obesity ,03 medical and health sciences ,Screen time ,children ,SDG 3 - Good Health and Well-being ,MEASURED PHYSICAL-ACTIVITY ,Journal Article ,medicine ,Humans ,Obesity ,sleep ,Exercise ,Sedentary lifestyle ,business.industry ,Physical activity ,Research ,Body Weight ,Australia ,Feeding Behavior ,030229 sport sciences ,Odds ratio ,medicine.disease ,Diet ,Cross-Sectional Studies ,recommendations ,Self Report ,business ,Sleep ,Body mass index ,Demography - Abstract
BACKGROUND: The Canadian 24-h movement guidelines were developed with the hope of improving health and future health outcomes in children and youth. The purpose of this study was to evaluate adherence to the 3 recommendations most strongly associated with health outcomes in new 24-h movement guidelines and their relationship with adiposity (obesity and body mass index z-score) across countries participating in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE).METHODS: Cross-sectional results were based on 6128 children aged 9-11 years from the 12 countries of ISCOLE. Sleep duration and moderate-to-vigorous physical activity (MVPA) were assessed using accelerometry. Screen time was measured through self-report. Body weight and height were measured. Body mass index (BMI, kg · m(-2)) was calculated, and BMI z-scores were computed using age- and sex-specific reference data from the World Health Organization. Obesity was defined as a BMI z-score > +2 SD. Meeting the overall 24-h movement guidelines was defined as: 9 to 11 h/night of sleep, ≤2 h/day of screen time, and at least 60 min/day of MVPA. Age, sex, highest parental education and unhealthy diet pattern score were included as covariates in statistical models. Associations between meeting vs. not meeting each single recommendation (and combinations) with obesity were assessed with odds ratios calculated using generalized linear mixed models. A linear mixed model was used to examine the differences in BMI z-scores between children meeting vs. not meeting the different combinations of recommendations.RESULTS: The global prevalence of children meeting the overall recommendations (all three behaviors) was 7%, with children from Australia and Canada showing the highest adherence (15%). Children meeting the three recommendations had lower odds ratios for obesity compared to those meeting none of the recommendations (OR = 0.28, 95% CI 0.18-0.45). Compared to not meeting the 24-h movement recommendations either independently or combined, meeting them was significantly associated with a lower BMI z-score. Whenever the MVPA recommendation was included in the analysis the odds ratios for obesity were lower.CONCLUSIONS: For ISCOLE participants meeting these 3 healthy movement recommendations the odds ratios of being obese or having high BMI z-scores were lower. However, only a small percentage of children met all recommendations. Future efforts should aim to find promising ways to increase daily physical activity, reduce screen time, and ensure an adequate night's sleep in children.TRIAL REGISTRATION: The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) was registered at ClinicalTrials.gov (Identifier NCT01722500) (October 29, 2012).
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39. Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE)
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Tudor Locke, C., Barreira, T. V., Schuna, J. M., Mire, E. F., Chaput, J. P., Fogelholm, M., Hu, G., Kuriyan, R., Kurpad, A., Lambert, E. V., Maher, C., Maia, J., Matsudo, V., Olds, T., Onywera, V., Sarmiento, O. L., Standage, M., Tremblay, M. S., Zhao, P., Church, T. S., Katzmarzyk, P. T., Lambert, D. G., Barreira, T., Broyles, S., Butitta, B., Champagne, C., Cocreham, S., Dentro, K., Drazba, K., Harrington, D., Johnson, W., Milauskas, D., Mire, E., Tohme, A., Rodarte, R., Amoroso, B., Luopa, J., Neiberg, R., Rushing, S., Lewis, L., Ferrar, K., Physio, B., Georgiadis, E., Stanley, R., Matsudo, V. K. R., Matsudo, S., Araujo, T., de Oliveira, L. C., Rezende, L., Fabiano, L., Bezerra, D., Ferrari, G., Bélanger, P., Borghese, M., Boyer, C., Leblanc, A., Francis, C., Leduc, G., Diao, C., Li, W., Liu, E., Liu, G., Liu, H., Ma, J., Qiao, Y., Tian, H., Wang, Y., Zhang, T., Zhang, F., Sarmiento, O., Acosta, J., Alvira, Y., Diaz, M. P., Gamez, R., Garcia, M. P., Gómez, L. G., Gonzalez, L., Gonzalez, S., Grijalba, C., Gutierrez, L., Leal, D., Lemus, N., Mahecha, E., Mahecha, M. P., Mahecha, R., Ramirez, A., Rios, P., Suarez, A., Triana, C., Hovi, E., Kivelä, J., Räsänen, S., Roito, S., Saloheimo, T., Valta, L., Lokesh, D. P., D'Almeida, M. S., Annie Mattilda, R., Correa, L., Vijay, D., Wachira, L. J., Muthuri, S., da Silva Borges, A., Oliveira Sá Cachada, S., de Chaves, R. N., Gomes, T. N. Q. F., Pereira, S. I. S., de Vilhena e. Santos, D. M., dos Santos, F. K., Rodrigues da Silva, P. G., de Souza, M. C., Lambert, V., April, M., Uys, M., Naidoo, N., Synyanya, N., Carstens, M., Donatto, S., Lemon, C., Jackson, A., Pearson, A., Pennington, G., Ragus, D., Roubion, R., Schuna, J., Wiltz, D., Batterham, A., Kerr, J., Pratt, M., Pietrobelli, Angelo, ISCOLE Research Group, Tudor-Locke, Catrine, Barreira, Tiago V, Schuna, John M, Mire, Emily F, Maher, Carol A, Olds, Timothy S, Katzmarzyk, Peter T, University of Helsinki, Department of Food and Nutrition, Nutrition Science, MRC/UCT RU for Exercise and Sport Medicine, and Faculty of Health Sciences
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Male ,Gerontology ,Pediatric Obesity ,Time Factors ,Accelerometry, Exercise, Measurement, Physical activity, Sedentary time, Pediatrics ,Medicine (miscellaneous) ,RA773 ,Accelerometer ,Pediatrics ,0302 clinical medicine ,Clinical Protocols ,Surveys and Questionnaires ,Accelerometry ,030212 general & internal medicine ,315 Sport and fitness sciences ,Child ,Measurement ,Nutrition and Dietetics ,ALGORITHMS ,Nutrition Surveys ,16. Peace & justice ,3. Good health ,Sedentary time ,Female ,medicine.medical_specialty ,Waist ,National Health and Nutrition Examination Survey ,Physical activity ,Physical Therapy, Sports Therapy and Rehabilitation ,Motor Activity ,Childhood obesity ,03 medical and health sciences ,SDG 3 - Good Health and Well-being ,medicine ,Humans ,WRIST ,Accelerometer data ,Wakefulness ,Life Style ,Exercise ,Protocol (science) ,HIP ,business.industry ,Methodology ,030229 sport sciences ,medicine.disease ,United States ,PHYSICAL-ACTIVITY ,Physical therapy ,Sleep ,business - Abstract
Background We compared 24-hour waist-worn accelerometer wear time characteristics of 9–11 year old children in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) to similarly aged U.S. children providing waking-hours waist-worn accelerometer data in the 2003–2006 National Health and Nutrition Examination Survey (NHANES). Methods Valid cases were defined as having ≥4 days with ≥10 hours of waking wear time in a 24-hour period, including one weekend day. Previously published algorithms for extracting total sleep episode time from 24-hour accelerometer data and for identifying wear time (in both the 24-hour and waking-hours protocols) were applied. The number of valid days obtained and a ratio (percent) of valid cases to the number of participants originally wearing an accelerometer were computed for both ISCOLE and NHANES. Given the two surveys’ discrepant sampling designs, wear time (minutes/day, hours/day) from U.S. ISCOLE was compared to NHANES using a meta-analytic approach. Wear time for the 11 additional countries participating in ISCOLE were graphically compared with NHANES. Results 491 U.S. ISCOLE children (9.92±0.03 years of age [M±SE]) and 586 NHANES children (10.43 ± 0.04 years of age) were deemed valid cases. The ratio of valid cases to the number of participants originally wearing an accelerometer was 76.7% in U.S. ISCOLE and 62.6% in NHANES. Wear time averaged 1357.0 ± 4.2 minutes per 24-hour day in ISCOLE. Waking wear time was 884.4 ± 2.2 minutes/day for U.S. ISCOLE children and 822.6 ± 4.3 minutes/day in NHANES children (difference = 61.8 minutes/day, p
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40. Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study.
- Author
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Roman-Viñas B, Chaput JP, Katzmarzyk PT, Fogelholm M, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, and Tremblay MS
- Subjects
- Accelerometry methods, Australia, Body Weight, Canada, Child, Cross-Sectional Studies, Diet, Feeding Behavior, Female, Guidelines as Topic, Humans, Male, Odds Ratio, Prevalence, Sedentary Behavior, Self Report, Sleep, Adiposity, Body Mass Index, Exercise, Pediatric Obesity etiology, Pediatric Obesity prevention & control
- Abstract
Background: The Canadian 24-h movement guidelines were developed with the hope of improving health and future health outcomes in children and youth. The purpose of this study was to evaluate adherence to the 3 recommendations most strongly associated with health outcomes in new 24-h movement guidelines and their relationship with adiposity (obesity and body mass index z-score) across countries participating in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE)., Methods: Cross-sectional results were based on 6128 children aged 9-11 years from the 12 countries of ISCOLE. Sleep duration and moderate-to-vigorous physical activity (MVPA) were assessed using accelerometry. Screen time was measured through self-report. Body weight and height were measured. Body mass index (BMI, kg · m
-2 ) was calculated, and BMI z-scores were computed using age- and sex-specific reference data from the World Health Organization. Obesity was defined as a BMI z-score > +2 SD. Meeting the overall 24-h movement guidelines was defined as: 9 to 11 h/night of sleep, ≤2 h/day of screen time, and at least 60 min/day of MVPA. Age, sex, highest parental education and unhealthy diet pattern score were included as covariates in statistical models. Associations between meeting vs. not meeting each single recommendation (and combinations) with obesity were assessed with odds ratios calculated using generalized linear mixed models. A linear mixed model was used to examine the differences in BMI z-scores between children meeting vs. not meeting the different combinations of recommendations., Results: The global prevalence of children meeting the overall recommendations (all three behaviors) was 7%, with children from Australia and Canada showing the highest adherence (15%). Children meeting the three recommendations had lower odds ratios for obesity compared to those meeting none of the recommendations (OR = 0.28, 95% CI 0.18-0.45). Compared to not meeting the 24-h movement recommendations either independently or combined, meeting them was significantly associated with a lower BMI z-score. Whenever the MVPA recommendation was included in the analysis the odds ratios for obesity were lower., Conclusions: For ISCOLE participants meeting these 3 healthy movement recommendations the odds ratios of being obese or having high BMI z-scores were lower. However, only a small percentage of children met all recommendations. Future efforts should aim to find promising ways to increase daily physical activity, reduce screen time, and ensure an adequate night's sleep in children., Trial Registration: The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) was registered at ClinicalTrials.gov (Identifier NCT01722500) (October 29, 2012).- Published
- 2016
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41. A model for presenting accelerometer paradata in large studies: ISCOLE.
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Tudor-Locke C, Mire EF, Dentro KN, Barreira TV, Schuna JM Jr, Zhao P, Tremblay MS, Standage M, Sarmiento OL, Onywera V, Olds T, Matsudo V, Maia J, Maher C, Lambert EV, Kurpad A, Kuriyan R, Hu G, Fogelholm M, Chaput JP, Church TS, and Katzmarzyk PT
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- Actigraphy, Child, Humans, Motor Activity, Surveys and Questionnaires, Accelerometry, Data Collection, Exercise, Life Style, Monitoring, Ambulatory, Pediatric Obesity etiology, Pediatric Obesity prevention & control
- Abstract
Background: We present a model for reporting accelerometer paradata (process-related data produced from survey administration) collected in the International Study of Childhood Obesity Lifestyle and the Environment (ISCOLE), a multi-national investigation of >7000 children (averaging 10.5 years of age) sampled from 12 different developed and developing countries and five continents., Methods: ISCOLE employed a 24-hr waist worn 7-day protocol using the ActiGraph GT3X+. Checklists, flow charts, and systematic data queries documented accelerometer paradata from enrollment to data collection and treatment. Paradata included counts of consented and eligible participants, accelerometers distributed for initial and additional monitoring (site specific decisions in the face of initial monitoring failure), inadequate data (e.g., lost/malfunction, insufficient wear time), and averages for waking wear time, valid days of data, participants with valid data (≥4 valid days of data, including 1 weekend day), and minutes with implausibly high values (≥20,000 activity counts/min)., Results: Of 7806 consented participants, 7372 were deemed eligible to participate, 7314 accelerometers were distributed for initial monitoring and another 106 for additional monitoring. 414 accelerometer data files were inadequate (primarily due to insufficient wear time). Only 29 accelerometers were lost during the implementation of ISCOLE worldwide. The final locked data file consisted of 6553 participant files (90.0% relative to number of participants who completed monitoring) with valid waking wear time, averaging 6.5 valid days and 888.4 minutes/day (14.8 hours). We documented 4762 minutes with implausibly high activity count values from 695 unique participants (9.4% of eligible participants and <0.01% of all minutes)., Conclusions: Detailed accelerometer paradata is useful for standardizing communication, facilitating study management, improving the representative qualities of surveys, tracking study endpoint attainment, comparing studies, and ultimately anticipating and controlling costs., Trial Registration: ClinicalTrials.gov: NCT01722500.
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- 2015
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42. Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE).
- Author
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Tudor-Locke C, Barreira TV, Schuna JM Jr, Mire EF, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Zhao P, Church TS, and Katzmarzyk PT
- Subjects
- Child, Clinical Protocols, Exercise, Female, Humans, Life Style, Male, Nutrition Surveys, Pediatric Obesity etiology, Pediatric Obesity prevention & control, Surveys and Questionnaires, Time Factors, United States, Accelerometry methods, Motor Activity, Sleep, Wakefulness
- Abstract
Background: We compared 24-hour waist-worn accelerometer wear time characteristics of 9-11 year old children in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) to similarly aged U.S. children providing waking-hours waist-worn accelerometer data in the 2003-2006 National Health and Nutrition Examination Survey (NHANES)., Methods: Valid cases were defined as having ≥4 days with ≥10 hours of waking wear time in a 24-hour period, including one weekend day. Previously published algorithms for extracting total sleep episode time from 24-hour accelerometer data and for identifying wear time (in both the 24-hour and waking-hours protocols) were applied. The number of valid days obtained and a ratio (percent) of valid cases to the number of participants originally wearing an accelerometer were computed for both ISCOLE and NHANES. Given the two surveys' discrepant sampling designs, wear time (minutes/day, hours/day) from U.S. ISCOLE was compared to NHANES using a meta-analytic approach. Wear time for the 11 additional countries participating in ISCOLE were graphically compared with NHANES., Results: 491 U.S. ISCOLE children (9.92±0.03 years of age [M±SE]) and 586 NHANES children (10.43 ± 0.04 years of age) were deemed valid cases. The ratio of valid cases to the number of participants originally wearing an accelerometer was 76.7% in U.S. ISCOLE and 62.6% in NHANES. Wear time averaged 1357.0 ± 4.2 minutes per 24-hour day in ISCOLE. Waking wear time was 884.4 ± 2.2 minutes/day for U.S. ISCOLE children and 822.6 ± 4.3 minutes/day in NHANES children (difference = 61.8 minutes/day, p < 0.001). Wear time characteristics were consistently higher in all ISCOLE study sites compared to the NHANES protocol., Conclusions: A 24-hour waist-worn accelerometry protocol implemented in U.S. children produced 22.6 out of 24 hours of possible wear time, and 61.8 more minutes/day of waking wear time than a similarly implemented and processed waking wear time waist-worn accelerometry protocol. Consistent results were obtained internationally. The 24-hour protocol may produce an important increase in wear time compliance that also provides an opportunity to study the total sleep episode time separate and distinct from physical activity and sedentary time detected during waking-hours., Trial Registration: ClinicalTrials.gov NCT01722500 .
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- 2015
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43. Patterns of walking for transport and exercise: a novel application of time use data.
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Tudor-Locke C, Bittman M, Merom D, and Bauman A
- Abstract
Background: Walking for exercise is a purposeful or structured activity that can be captured relatively easily in surveys focused on leisure time activity. In contrast, walking for transport is an incidental activity that is likely to be missed using these same assessment approaches. Therefore, the purpose of this analysis was to utilize 1997 Australian Bureau of Statistics (ABS) Time Use Survey diary data to describe nationally representative patterns of walking for transport and for exercise., Methods: Household members >or= 15 years of age were recruited from over 4,550 randomly selected private dwellings in Australia. Time use diaries were collected for two designated days during all four seasons over the calendar year. 3,471 males and 3,776 females (94% household response rate and 84% person response rate) provided 14,315 diary days of data. The raw diary data were coded and summarized into bouts and minutes that included walking for transport and for exercise., Results: Walking for transport was indicated on a higher proportion of days compared to walking for exercise (20 vs. 9%). Based on participant sub-samples ('doers'; those actually performing the activity) walking for transport was performed over 2.3 +/- 1.4 bouts/day (12.5 minutes/bout) for a total of approximately 28 mins/day and walking for exercise over 1.2 +/- 0.5 bouts/day (47 minutes/bout) for a total of approximately 56 mins/day., Conclusion: Although walking for transport is typically undertaken in multiple brief bouts, accumulated durations approximate public health guidelines for those who report any walking for transport.
- Published
- 2005
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