Progressive resistance training improves single-leg vertical jump after anterior cruciate ligament reconstruction:
Wei-Hsiu Hsu1, Chun-Hao Fan2, Pei-An Yu3
1Sports Medicine Center, Chang Gung Memorial Hospital at Chia Yi, Chia Yi, Taiwan; Department of Orthopedic Surgery, Chang Gung Memorial Hospital at Chia Yi, Chia Yi, Taiwan; School of Medicine, Chang Gung University, Tao-Yuan, Taiwan.
Objectives:
The study was investigating the effect of a progressive resistance training program on the recovery of patients with anterior cruciate ligament reconstruction in terms of kinematics, kinetics and muscle strength.
Design:
Longitudinal cohort study.
Setting:
Hospital laboratory.
Participants:
Of the 42 patients were finally included: 22 patients in the progressive resistance training group and 20 in the control group.
Main Outcome Measures:
Questionnaire, single-leg vertical jump, and muscle strength were collected preoperatively and at 16, 28 weeks, and 1 year postoperatively.
Results:
At 28 weeks, the height of the single-leg vertical jump for the injured knee was 203 and 157 mm (p = 0.045) and the peak knee flexion angle after landing for the injured knee was 31°and 23° (p = 0.027) in the progressive resistance training and control groups, respectively. The progressive resistance training group showed a significant increase in the knee extensor symmetry index after the 24-week exercise training compared from 58% preoperatively to 79% (p = 0.001) after training completion, which lasted up to 1 year postoperatively.
Conclusion:
Progressive resistance training significantly improved knee extensor symmetry, single-leg vertical jump height, and peak knee flexion angle after landing, outperforming the control group across all measures.
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