基于更大程度的双侧肩部旋转肌力量差异，女性海军陆战队队员报告既往肩部损伤的几率显著增加。
Significantly Increased Odds of Reporting Previous Shoulder Injuries in Female Marines Based on Larger Magnitude Shoulder Rotator Bilateral Strength Differences.
作者信息
Eagle Shawn R, Connaboy Chris, Nindl Bradley C, Allison Katelyn F
机构信息
Neuromuscular Research Laboratory/Warrior Human Performance Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
出版信息
Orthop J Sports Med. 2018 Feb 21;6(2):2325967118756283. doi: 10.1177/2325967118756283. eCollection 2018 Feb.
BACKGROUND
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.
PURPOSE
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.
STUDY DESIGN
Cohort study; Level of evidence, 3.
METHODS
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.
RESULTS
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 differences (OR, 15.4; 95% CI, 1.4-167.2; = .03 ) and female Marines with 10% to 20% strength differences (OR, 13.9; 95% CI, 1.3-151.2; = .04). No significant ORs were demonstrated in male Marines.
CONCLUSION
Marines with larger magnitude internal rotation strength differences demonstrated increased odds of reporting a previous shoulder injury compared with those with lesser magnitude differences. Additionally, female sex appears to drastically affect the increased odds of reporting shoulder injuries (OR, 13.9-15.4) with larger magnitude differences (ie, >20%) compared with those with lesser magnitude differences (ie, <10% and 10%-20%). The retrospective cohort design of this study cannot delineate cause and effect but establishes a relationship between female Marines and greater odds of larger magnitude strength differences after returning from an injury.
背景
四肢肌肉骨骼损伤是美国军队主要关注的问题。该人群中一个可能的损伤风险因素是左右力量不平衡。
目的
基于等速肩部力量的左右差异，研究美国海军陆战队地面战斗要素综合特遣部队志愿者中报告既往肩部损伤的几率。
研究设计
队列研究；证据等级，3级。
方法
本分析纳入了男性（n = 219）和女性（n = 91）海军陆战队员。5次肩部内/外旋转重复动作的峰值扭矩值进行平均，并按体重进行标准化。左右力量测量的差异计算为肢体差异的绝对值除以优势肢体的平均峰值扭矩。参与者根据这些差异的大小分为几组：<10%、10%至20%和>20%。计算优势比（OR）和95%置信区间（CI）。
结果
按性别分开时，13.2%的男性报告有损伤，而5.5%的女性报告有损伤。内旋左右力量差异>20%的女性海军陆战队员与力量差异<10%的女性海军陆战队员相比，报告既往肩部损伤的几率增加（OR，15.4；95%CI，1.4 - 167.2；P = 0.03），与力量差异在10%至20%的女性海军陆战队员相比也是如此（OR，13.9；95%CI，1.3 - 151.2；P = 0.04）。男性海军陆战队员中未显示出显著的OR值。
结论
与力量差异较小的海军陆战队员相比，内旋力量差异较大的海军陆战队员报告既往肩部损伤的几率增加。此外，与力量差异较小（即<10%和10% - 20%）的情况相比，女性似乎会显著影响力量差异较大（即>20%）时报告肩部损伤几率的增加（OR，13.9 - 15.4）。本研究的回顾性队列设计无法确定因果关系，但确立了女性海军陆战队员与受伤归来后力量差异较大几率之间的关系。
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