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Updated: Aug 24, 2025
Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
Improvement of lower-extremity stability by rotational leg press training
Yu-Hsun Lo1, Wen-Yi Chou2, Ke-Tien Yen3
1Sports Medicine Center, Department of Orthopaedic Surgery, Kaohsiung Chang Gung Memorial Hospital, No.123, Dapi Rd., Niaosong Dist., Kaohsiung City 833, Taiwan; Center of Comprehensive Sports Medicine, Chang Gung Memorial Hospital, No.123, Dinghu Rd., Guishan Dist., Taoyuan County, 333, Taiwan.
Backgrounds:
Previous reports revealed that balance and stability are essential for human physical activity. The present study aimed to evaluate the comparative outcome of a novel beginning movement load training (BMLT) versus conventional leg press training in terms of improvement of lower-extremity stability.
Research Question:
Does the leg press training improve the stability of lower extremities?
Methods:
Twenty adult, asymptomatic and active amateur basketball players were enrolled in this study and randomized in equal numbers into a BMLT group (study group) and a conventional leg press training group (control group).
Results:
The results after eight-week course of training showed that conventional leg press training had an opposite effect on dynamic stability in the left leg (p = 0.015) and backward movement of the right leg (p = 0.038). The athletes in the study group revealed superior dynamic stability maintenance in both legs backwards (p = 0.001), the left leg (p = 0.013), the right leg backwards (p = 0.022) and overall stability (p = 0.002).
Significance:
The study group showed better postural stability in terms of the medial/lateral index (p = 0.017), and the athletes in the control group exhibited a significant inability to maintain postural stability in the medial/lateral aspect after the training (p = 0.016). Rotational BMLT lower-extremity press training yielded superior enhancement of dynamic stability and maintenance of center of gravity and postural stability.
