Isokinetic measurements are considered important variables for return to sport, however, isokinetic testing is not easily accessible to most athletes. In this context, physical therapists use self-reported scales and questionnaires to better understand knee function and readiness to return to sports activities. However, little evidence addresses how self-reported measures of subjective function and psychological readiness may be associated with recovery of function after Anterior Cruciate Ligament Reconstruction (ACLR).

To analyze the correlation between isokinetic variables, psychological readiness measured by the Return to Sport Scale (ACL-RSI) and subjective function by the International Knee Documentation Committee (IKDC) after 6 months of ACLR.

This is a pilot study (), with 7 participants undergoing ACLR (27.5±6.9), 6 men and 1 woman, who participated in the standardized evaluation and treatment protocol over 6 months. At the end of 6 months of ACLR, they underwent isokinetic evaluation and responded to ACL-RSI and IKDC. The outcomes evaluated were isokinetic strength, Limb Symmetry Index (LSI) and Muscle Impairment Index (MDI), ACL-RSI and IKDC. The analyses performed were Pearson&apos;s Correlation Coefficient in SPSS29 (p < 0,05). The correlations in relation to ACL-RSI and IKDC, respectively, were: For extensor strength r = -0.200 (p = 0.667) and r = -0.860 (p = 0.855) and flexor r = -0.254 (p = 0.582) and r = -0.226 (p = 0.627), extensor LSI r = 0.422 (p = 0.346) and r = 0.294 (p = 0.523) and flexor r = 0.297 (p = 0.518) and r = 0.173 (p = 0.711) and extensor IDM r = 0.412 (p = 0.358) and r = 0.145 (p = 0.757) and flexor r = -0.740 (p = 0.057) r=-0.580 (p = 0.902). There were no significant results. Conclusion: Isokinetic measures 6 months after ACLR were not associated with psychological readiness as measured by the ACL-RSI Return to Sport Scale (ACL-RSI) and subjective function as measured by the International Knee Documentation Committee (IKDC). This may be related to the sample size, subjectivity of the ACL-RSI and IKDC scores. Implications: The results provide information that self-reported outcome scores can be used as an additional screening tool in conjunction with isokinetic variables to help promote better recovery and resumption of activities.

Isokinetic measures 6 months after ACLR were not associated with psychological readiness as measured by the ACL-RSI Return to Sport Scale (ACL-RSI) and subjective function as measured by the International Knee Documentation Committee (IKDC). This may be related to the sample size, subjectivity of the ACL-RSI and IKDC scores.

The results provide information that self-reported outcome scores can be used as an additional screening tool in conjunction with isokinetic variables to help promote better recovery and resumption of activities.