Modified Hold-Relax Stretching Technique Combined with Moist Heat Therapy to Improve Neuromuscular Properties in College Students with Hamstring Tightness

Abstract

Introduction: This study aims to evaluate the effect of modified hold-relax stretching combined with moist heat therapy on hamstring muscle flexibility, EMG activity and strength in college students with hamstring tightness. Materials and Methods: Thirty-eight college students with hamstring tightness were recruited and were divided into two groups. Group 1 received modified hold-relax stretching plus moist heat therapy and Group 2 received moist heat therapy alone, three days a week for four weeks. The knee range of motion (ROM), muscle strength and Electromyography (EMG) activity before and after the treatment protocol were measured. Results: There was no significant difference between the two groups in demographic characteristics. The knee ROM was significantly different  between  groups  in  terms  of  time (P=0.001) and group (P=0.005) effects, but the strength and EMG activity were not significantly different. Conclusion: The modified hold-relax technique combined with moist heat therapy is effective in increasing hamstring flexibility, but has no significant effect on the muscle EMG activity and strength.