Objectives
To examine the relationship between three types of single-leg hop for distance (SLHD), the triple hop for distance (TPD), and clinical variables at 6 months after anterior cruciate ligament reconstruction (ACLR).
Design
Cross-sectional study.
Participants
A total of 114 knees from 114 patients (53 males, 61 females; mean age: 23.6 ± 9.2 years) who underwent primary unilateral ACLR were assessed at 6 months postoperatively.
Main outcome measures
Outcome measures included a four-hop test battery, isokinetic knee strength, pain intensity during movement, disturbed body perception, and intensity of fear during each hop test. Multiple regression analyses were conducted, using the limb symmetry index (LSI) of each hop test as the dependent variable and clinical factors as independent variables.
Results
Multiple regression analysis showed that the LSIs of the three SLHD types were independently associated with disturbed body perception, fear during SLHD, and knee extensor strength, respectively. For triple hop for distance (THD), disturbed body perception, fear during SLHD, and knee flexor strength were independently related to performance.
Conclusions
These findings highlight the need to integrate not only muscle strengthening but also assessments addressing disturbed body perception and movement-specific fear into rehabilitation programs aimed at facilitating return-to-sport after ACLR.
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