Residual Deficits in Reactive Strength After Anterior Cruciate Ligament Reconstruction in Soccer Players.

EXPERIMENTAL design; SPORTS participation; MEDICAL rehabilitation; STATISTICS; SOCCER injuries; CROSS-sectional method; MULTIPLE regression analysis; CASE-control method; MUSCLE strength testing; SPORTS injuries; TASK performance; FUNCTIONAL assessment; T-test (Statistics); PEARSON correlation (Statistics); ANTERIOR cruciate ligament injuries; MUSCLE strength; BODY movement; DESCRIPTIVE statistics; ANTERIOR cruciate ligament surgery; ATHLETIC ability; PLYOMETRICS; JUMPING; DATA analysis; DATA analysis software; REHABILITATION

Deficits in plyometric abilities are common after anterior cruciate ligament reconstruction (ACLR). Vertical rebound tasks may provide a targeted evaluation of knee function. To examine the utility of a vertical hop test for assessing function after ACLR and establishing factors associated with performance. Cross-sectional study. Rehabilitation program. Soccer players with a history of ACLR (n = 73) and matched control individuals (n = 195). The 10-second vertical hop test provided measures of jump height, the Reactive Strength Index (RSI), and asymmetry. We also examined possible predictors of hop performance, including single-legged vertical drop jump, isokinetic knee-extension strength, and the International Knee Documentation Committee questionnaire score. Between-limbs differences were identified only for the ACLR group, and asymmetry scores increased in those with a history of ACLR (P <.001) compared with the control group. The single-legged vertical drop jump, RSI, and knee-extension torque were significant predictors of 10-second hop height (R2 = 20.1%) and RSI (R2 = 47.1%). Vertical hop deficits were present after ACLR, even after participants completed a comprehensive rehabilitation program. This may have been due to reduced knee-extension and reactive strength. Vertical hop tests warrant inclusion as part of the return-to-sport test battery. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Athletic Training (Allen Press) is the property of KnowledgeWorks Global, Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)