Significantly Increased Odds of Reporting Previous Shoulder Injuries in Female Marines Based on Larger Magnitude Shoulder Rotator Bilateral Strength Differences

Orthopaedic Journal of Sports Medicine
Shawn R EagleKatelyn F Allison

Abstract

Musculoskeletal injuries to the extremities are a primary concern for the United States (US) military. One possible injury risk factor in this population is side-to-side strength imbalance. To examine the odds of reporting a previous shoulder injury in US Marine Corps Ground Combat Element Integrated Task Force volunteers based on side-to-side strength differences in isokinetic shoulder strength. Cohort study; Level of evidence, 3. Male (n = 219) and female (n = 91) Marines were included in this analysis. Peak torque values from 5 shoulder internal/external rotation repetitions were averaged and normalized to body weight. The difference in side-to-side strength measurements was calculated as the absolute value of the limb difference divided by the mean peak torque of the dominant limb. Participants were placed into groups based on the magnitude of these differences: <10%, 10% to 20%, and >20%. Odds ratios (ORs) and 95% CIs were calculated. When separated by sex, 13.2% of men reported an injury, while 5.5% of women reported an injury. Female Marines with >20% internal rotation side-to-side strength differences demonstrated increased odds of reporting a previous shoulder injury compared with female Marines with <10% strength diff...Continue Reading

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Citations

Jan 3, 2019·Medicine and Science in Sports and Exercise·Chris ConnaboyBradley C Nindl
Feb 1, 2019·American Journal of Physical Medicine & Rehabilitation·Valerio SansoneFrancesco Negrini
Apr 16, 2019·Medicine and Science in Sports and Exercise·Chris ConnaboyBradley C Nindl
Dec 29, 2020·Military Medicine·Pauline BarbeauKristi B Adamo

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