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The correlation between knee kinematics and self-reported outcome874tests may provide more insight in how patients are progressing during their rehabilitation and can provide more knowledge as to why some patients do and other patients do not successfully return to sport.It has been suggested that during rehabilitation a more holistic approach is necessary, in which physicians must acknowledge that there is a human being attached to the injured knee.16 Not only biomechanics but also psychological factors are of increasing interest, and it is important that it is better understood how they affect rehabilitation.16Strengths and limitationsThis study is to our knowledge, the first to study the relationship between objective measures and self-reported knee function as well as psychological readiness during high demanding tasks (SLH and side jump) in an ACLR population. It provides more insight into how and which objective measures are related to the self-reported knee function and psychological readiness of the ACLR individual. The small sample size is an issue that must be taken into account. Since concomitant injury (to the menisci and anterolateral structures of the knee) can influence rTR, strict in-and-exclusion criteria were applied.23,49This reduced the number of subjects who could participate in the study and may have led to a certain bias. ConclusionKnee kinematics during high demand tasks are strongly related to selfreported knee function and psychological readiness. Knee kinematics of an ACLR knee close to normal knee kinematics are related to better selfreported knee function and psychological readiness. A smaller rTR during high demanding tasks is related to poorer self-reported knee function and psychological readiness after ACLR and can be an indication of a protective strategy adopted by the patient. Measuring rTR during high demanding tasks could potentially expose underlying altered movement strategies and provide more information about the relation between the biomechanics and patient reported outcome measures within the ACLR population. Mark Zee.indd 87 03-01-2024 08:56