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چکیده
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Purpose: Anterior Cruciate Ligament (ACL) injury is among the mos prevalent knee injuries among young athletes, aged 15-25 and occurs in 70% through a noncontact mechanism. Medial Knee Displacement (MKD) is the key risk factor of ACL injury in basketball athletes. The present sudy invesigated the effect of an MKD corrective exercises program on knee kinematics during Drop Vertical Jump (DVJ), and its performance in male basketball players. Methods: The sudy participants consised of 32 male basketball players (Mean±SD age: 20.8±1.7 years, weight 74.0±5.2 kg, height 183.9±5.0 cm, body mass index 21.86±1.19 kg/ m2, and experience 8.75±1.42 years) with MKD during Double Leg Squat (DLS) tes. The subjects were randomly placed into two groups (training, n=16, control, n=16). Training group participated in 10 sessions of the corrective exercise program. Pre-tes and pos-tes assessments included knee kinematic during DVJ and performance tes (Y balance and hop) in the dominant leg. Results: The analysis of covariance tes results revealed that the effects of the Pre-tes, as well as the effects of groups on the pos-tes variables in the training group, were satisically signifcant (P<0.01) for all variables, except for knee flexion angle. Additionally, the training group experienced signifcant improvements (P<0.01) in kinematic variables during DVJ, such as reduced MKD in the pre-land frame (4.32º) and reduced MKD in a land frame (5.51º). They also indicated signifcant improvements (P<0.01) in performance variables, such as increased total Y balance tes (3.33 cm), increased single hop tes (13.25 cm), increased triple hop tes (22.25 cm), increased crossover hop tes (19.81 cm), and reduced (0.23 s) 6 meter timed hop tes scores. Conclusion: Due to the correction key risk factors of noncontact ACL injury Medial Knee Displacement (MKD), improved landing kinematic and increased performance, it seems that in male basketball players with MKD, this corrective exercises program can help to prevent noncontact knee injuries caused by MKD during functional activities like DVJ; it can also help to improve performance.
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