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3. Demographic, psychosocial, and physical fitness predictors of successful graduation from U.S. Army Ranger School.

Author

Benedict, Timothy M., Grier, Tyson L., Roy, Tanja C., Toussaint, Maisha N., and Jones, Bruce H.

Subjects
MULTIPLE regression analysis, AGE distribution, PHYSICAL fitness, SELF-efficacy, COURAGE, CONDITIONED response, PSYCHOLOGICAL resilience, MILITARY personnel, LONGITUDINAL method
Abstract

U.S. Army Ranger School is an arduous 64-day leadership training course designed to simulate the stressors of combat. Although physical fitness has been shown to be an important predictor of successful graduation for Ranger School, psychosocial characteristics like self-efficacy and grit have not been examined. The purpose of this study is to identify personal, psychosocial, and fitness characteristics associated with successful completion of Ranger School. This study was a prospective cohort examining the association of baseline characteristics of Ranger School candidates with a primary outcome of graduation success. Multiple logistic regression was performed to determine the contribution of demographics, psychosocial, fitness and training characteristics to graduation success. Out of 958 eligible Ranger Candidates, this study obtained graduation status for 670 students, 270 (40%) of which graduated. Soldiers who graduated were younger, more likely to come from units with a higher proportion of previous Ranger School graduates, had higher self-efficacy and faster 2-mile run times. The results from this study suggest that Ranger students should arrive in optimal physical conditioning. Furthermore, training programs that optimize student self-efficacy and units with a high proportion of successful Ranger graduates may confer advantage for this challenging leadership course. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Reliability of a measurement of neck flexor muscle endurance

Author

Harris, Kevin D., Heer, Darren M., Roy, Tanja C., Santos, Diane M., Whitman, Julie M., and Wainner, Robert S.

Subjects
Physical therapy -- Research, Therapeutics, Physiological -- Research, Neck pain -- Physiological aspects, Muscle rigidity -- Measurement
Abstract

Background and Purpose. Neck flexor muscle endurance has been negatively correlated with cervical pain and dysfunction. The purposes of this study were to determine rater reliability in subjects both with and without neck pain and to determine whether there was a difference in neck flexor muscle endurance between the 2 groups. Subjects. Forty-one subjects with and without neck pain were enrolled in this repeated-measures reliability study. Methods. Two raters used an isometric neck retraction test to assess neck flexor muscle endurance for all subjects during an initial session, and subjects without neck pain returned for testing 1 week later. Results. For the group without neck pain, intrarater reliability was good to excellent (intraclass correlation coefficient [ICC (3,1)] =.82-.91), and interrater reliability was moderate to good (ICC[2,1]=.67-.78). The associated standard error of measurement (SEM) ranged from 8.0 to 11.0 seconds and from 12.6 to 15.3 seconds, respectively. For the group with neck pain, interrater reliability was moderate (ICC [9,1 ] = .67, SEM = 11.5). Neck flexor muscle endurance test results for the group without neck pain ([bar]X=38.95 seconds, SD=26.4) and the group with neck pain ([bar]X=24.1 seconds, SD=12.8) were significantly different. Discussion and Conclusion. Reliability coefficients differed between the 2 groups and ranged from moderate to excellent and improved after the first test session. The interrater reliability of data obtained with the neck flexor muscle endurance test in people with neck pain must be improved in order for clinicians to distinguish a clinically meaningful change from measurement error. Neck flexor muscle endurance was both statistically and clinically greater for subjects without neck pain than for those with neck pain. Key Words: Cervical impairment, Cervical pain, Chin tuck, Deep neck flexors., Cervical spine pain affects nearly 50% of the population at some time in their lives. (1) It is often associated with a variety of complications, such as headache and loss [...]

Published
2005

9. Physical training risk factors for musculoskeletal injury in female solders

Author

Roy, Tanja C. and Roy, Tanja C.

Abstract

Musculoskeletal injuries result in the most medical encounters, lost duty days, and service members on permanent disability. Women are at greater risk of injury than men and physical training is the leading cause of injury. The purpose of this study is to investigate the demographic, body composition, fitness, and physical training risk factors for injuries in female soldiers serving in operational Army units over the past 12 months. Self-report survey was collected from 625 women. Correlation, chi squared, relative risk, and logistic regression were used to analyze the results. The ankle was the most frequently injured body region, 13%. Running was the activity most often associated with injury, 34%. In univariate analysis rank, age, history of deployment, weekly frequency of unit runs, weekly frequency of personal strength training, and history of injury were all associated with injury. Having the rank of private to specialist increased the relative risk (RR) of injury by 68%, being in the Blue Brigade increased the RR by 48%, having no history of deployment increased the RR by 48%, having a history of injury in the last 12 months increase the RR by 160%, having no weekly unit runs increased the RR by 53%, having a weekly frequency of 1-2 personal weight training sessions increased RR by 42%, having a run time between 17 and 18 minutes increased RR by 71%, and having an Army Physical Fitness Score below 290 increased RR at least 70%. In multivariate analysis rank, history of injury, weekly frequency of unit runs, and weekly frequency of personal strength training were the best combination of predictors of injury in female soldiers. Running once or twice a week with the unit protected against MSI while participating in personal strength training sessions once or twice a week increased the risk of MSI. Fitness was neither protective nor harmful when all other variables were accounted for in the equation. The public health significance is that with a higher emphasis

Published
2014

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