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The purpose of this study was to quantify the inter-session reliability of force–velocity–power profiling and estimated maximal strength in youth. Thirty-six males (11–15 years old) performed a ballistic supine leg press test at five randomized loads (80%, 100%, 120%, 140%, and 160% body mass) on three separate occasions. Peak and mean force, power, velocity, and peak displacement were collected with a linear position transducer attached to the weight stack. Mean values at each load were used to calculate different regression lines and estimate maximal strength, force, velocity, and power. All variables were found reliable (change in the mean [CIM] = − 1 to 14%; coefficient of variation [CV] = 3–18%; intraclass correlation coefficient [ICC] = 0.74–0.99), but were likely to benefit from a familiarization, apart from the unreliable maximal force/velocity ratio (CIM = 0–3%; CV = 23–25%; ICC = 0.35–0.54) and load at maximal power (CIM = − 1 to 2%; CV = 10–13%; ICC = 0.26–0.61). Isoinertial force–velocity–power profiling and maximal strength in youth can be assessed after a familiarization session. Such profiling may provide valuable insight into neuromuscular capabilities during growth and maturation and may be used to monitor specific training adaptations. [ABSTRACT FROM PUBLISHER]

Aim and objective. To investigate health differences between nurses who report meeting the daily physical activity recommendations in or away from the workplace. Background. Adhering to the national physical activity recommendations has known health benefits. Whilst often considered a workplace active profession, data are emerging of poor health amongst nurses. However, health differences between workplace or leisure-time physically active nurses are understudied. Design. The investigation is an observation study of Australian and New Zealand nurses. Data were generated from the longitudinal, population-based, observational e-Cohort nursing survey. Methods. Data were informed and groups defined by the self-reported minutes per day of moderate physical activity collected from a large international survey of practicing nurses ( n = 2264). Groups were: Group (G) 1 - high workplace (≥30 minutes/day)/high leisure (≥30 minutes/day), G2 - high workplace/low leisure (<30 minutes/day), G3 - low workplace/low leisure (<30 minutes/day) and G4 - low workplace/high leisure. Results. G2 had a high BMI and were younger than G4. G4 were significantly more active away from work and more likely to report cycling to work than G2. In contrast, G2 were most likely to have taken sick days because of their health (χ2 = 19·101), have difficulty sleeping most of the time and have a medical history of diagnosed anxiety and depression. Conclusions. This study shows that improved well-being can be achieved in nursing cohort through leisure-time physical activity. Relevance to clinical practice. This research shows that nurse should consider leisure-time physical activity necessary to maintain and prolong health and that workplace activity is not a sufficient stimulus. This has important implications for workforce planners and administrators. [ABSTRACT FROM AUTHOR]

The prevalence of overweight and obesity is increasing worldwide at an alarming rate. An Internet-based weight-loss programme has the potential to reach larger numbers of people than traditional face-to-face programmes. A growing body of evidence supports the use of low glycaemic load (GL) diets for weight loss. The present study aimed to investigate the efficacy of an Internet-based weight-loss programme that included foods with a low GL. One hundred and three volunteers, with a body mass index (BMI) ≥28 kg m, enrolled into an Internet weight-loss programme. A dietitian counselled participants over the Internet via weekly interactive chat rooms and monthly e-mails. Participants self-recorded body weight and food intake directly on to the Internet site. Weight, BMI and waist circumference were measured, and dietary data collected, at baseline and 6 months. Seventy participants completed the 6-month weight-loss programme. Among these, mean weight, BMI and waist circumference significantly decreased by 3.5 kg (95% CI = 2.3-4.7), 1.2 kg m (95% CI = 0.8-1.7) and 4.8 cm (95% CI = 2.8-6.8), of baseline values respectively ( P < 0.001). Twenty-five (36%) of the 70 participants lost a clinically significant amount of weight (>5% of initial body weight). This descriptive study has shown that an Internet-based weight-loss programme with low GL principles can promote weight loss. This type of intervention and approach could be used to enhance other weight-loss strategies. [ABSTRACT FROM AUTHOR]