Dinamik Germe Egzersizinin Zirve ve Eklem Hareket Açıklığının Uç Açılarındaki Fonksiyonel Hamstring/Quadriceps Kuvvet Oranları Üzerine Etkisi

Abstract

Objective: Although recent studies have shown that dynamic stretching may improve individual muscle strength performance, its effects on the functional hamstring/quadriceps (H/Q) strength ratio and thus on injury risk characteristics has not been investigated in depth. The aim of this study was to assess the effects of dynamic stretching on functional H/Q strength ratios for isokinetic knee extension and flexion at peak and end range moments in elite women athletes. Material and Methods: A total of twelve healthy elite competitive female athletes (mean age 20 ± 2 years, mean height 166 ± 6 cm, mean weight 58 ± 7 kg) volunteered to participate in the study. All subjects completed a non-stretching (control) or a dynamic stretching intervention protocol in a randomized fashion on separate days. The quadriceps and hamstring muscles were stretched during these protocols. Before (pre) and after (post) the intervention, the functional H/Q strength ratio was calculated at 60°•s-1 and 180°•s-1 angular velocities. Results: The strength ratio for knee extension displayed a significant increase and for knee flexion a significant decrease following dynamic stretching during the entire and end range of motion at both angular velocities (p< 0.05). Conclusion: The effects of dynamic stretching on functional H/Q strength ratios suggest that the functional H/Q ratio do change positively following a dynamic stretching routine.