Bilateral Quadriceps Strength Asymmetry Is Associated With Previous Knee Injury in Military Special Tactics Operators

ABSTRACTEagle, SR, Keenan, KA, Connaboy, C, Wohleber, M, Simonson, A, and Nindl, BC. Bilateral quadriceps strength asymmetry is associated with previous knee injury in military special tactics operators. J Strength Cond Res 33(1)89–94, 2019—Bilateral strength asymmetries have been related to lower-l...

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Published in:Journal of strength and conditioning research 2019-01, Vol.33 (1), p.89-94
Main Authors: Eagle, Shawn R, Keenan, Karen A, Connaboy, Chris, Wohleber, Meleesa, Simonson, Andrew, Nindl, Bradley C
Format: Article
Language:English
Subjects:
Adult
Asymmetry
Athletes
Athletic Injuries - prevention & control
Humans
Joint and ligament injuries
Knee
Knee Injuries - physiopathology
Lower Extremity
Male
Military Personnel
Muscle Strength
Quadriceps muscle
Quadriceps Muscle - physiology
Quadriceps Muscle - physiopathology
Strength training
Young Adult
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Summary:ABSTRACTEagle, SR, Keenan, KA, Connaboy, C, Wohleber, M, Simonson, A, and Nindl, BC. Bilateral quadriceps strength asymmetry is associated with previous knee injury in military special tactics operators. J Strength Cond Res 33(1)89–94, 2019—Bilateral strength asymmetries have been related to lower-limb injury in athletes. Given that military populations often participate in recreational sport, in addition to a physically demanding workload, bilateral strength asymmetries may be related to injury in military populations. The purpose of this study was to determine whether isokinetic strength differs between Operators with/without self-reported knee injury (KI), and to examine the odds of displaying a lower-extremity strength asymmetry based on previous KI history. Operators (n = 150) self-reported injury history and performed isokinetic knee strength testing. Cohorts were separated by those who reported/not reported KI. Mean isokinetic knee strength and odds ratios, with subjectsʼ KI history compared with strength differences20%, were calculated. Operators who reported KI demonstrated larger bilateral knee extension (KE) strength differences compared with those who did not report an injury (injured13.5 ± 12.9% vs. noninjured8.1 ± 5.9%, p = 0.01). Operators with 20% strength difference (p < 0.05). Operators with previous KI demonstrated bilateral differences in KE strength. Those with
ISSN:1064-8011
1533-4287
DOI:10.1519/JSC.0000000000002920