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The effect of a 3-month prevention program on the jump-landing technique in basketball: a randomized controlled trial
Aerts I, Cumps E, Verhagen E, Wuyts B, van de Gucht S, Meeusen R
Journal of Sport Rehabilitation 2015;24(1):21-30
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

CONTEXT: In jump-landing sports, the injury mechanism that most frequently results in an injury is the jump-landing movement. Influencing the movement patterns and biomechanical predisposing factors are supposed to decrease injury occurrence. OBJECTIVES: To evaluate the influence of a 3-mo coach-supervised jump-landing prevention program on jump-landing technique using the jump-landing scoring (JLS) system. DESIGN: Randomized controlled trial. SETTING: On-field. PARTICIPANTS: 116 athletes age 15 to 41 y, with 63 athletes in the control group and 53 athletes in the intervention group. INTERVENTION: The intervention program in this randomized control trial was administered at the start of the basketball season 2010 to 2011. The jump-landing training program, supervised by the athletic trainers, was performed for a period of 3 mo. MAIN OUTCOME MEASURES: The jump-landing technique was determined by registering the jump-landing technique of all athletes with the JLS system, pre- and post-intervention. RESULTS: After the prevention program, the athletes of the male and female intervention groups landed with a significantly less erect position than those in the control groups (p < 0.05). This was presented by a significant improvement in maximal hip flexion, maximal knee flexion, hip active range of motion, and knee active range of motion. Another important finding was that post-intervention, knee valgus during landing diminished significantly (p < 0.05) in the female intervention group compared with their control group. Furthermore, the male intervention group significantly improved (p < 0.05) the scores of the JLS system from pre- to post-intervention. CONCLUSION: Malalignments such as valgus position and insufficient knee flexion and hip flexion, previously identified as possible risk factors for lower-extremity injuries, improved significantly after the completion of the prevention program. The JLS system can help in identifying these malalignments. LEVEL OF EVIDENCE: Therapy, prevention, level 1b.
Copyright Human Kinetics. Reprinted with permission from Human Kinetics (Champaign, IL).

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