Agopyan A, Tekin D, Unal M, Kurtel H, Turan G, Ersoz A
Department of Trainer Education School of Physical Education and Sports Marmara University, Istanbul, Turkey2Department of Physiotherapy and Rehabilitation School of Health Sciences Istanbul Bilgi University, Istanbul, Turkey3Department of Physiotherapy and Rehabilitation Faculty of Health Sciences Yeni Yuzyil University, Istanbul, Turkey4Department of Sports Physiology School of Medicine, Marmara University Istanbul, Turkey5Department of Physical Education and Sports Institute of Health Sciences Marmara University, Istanbul, Turkey6Department of Music and Performing Arts Dance Program Faculty of Arts and Design Yildiz Technical University, Istanbul, Turkey -
J Sports Med Phys Fitness. 2013 Oct;53(5):538-50.
The aim of this study was to examine the acute effects of static stretching in dominant leg flexor muscle groups on concentric isokinetic leg extension and flexion peak torque (PT), peak torque % body weight (PT%BW) and total work (TW) at 60, 180 and 300 °.s-1 in stretched and non-stretched limbs of modern dancers.
Twenty-six trained modern dancers volunteered in this study. On the first measurement, isokinetic tests were performed on dominant and non-dominant legs. On the second measurement, the dominant leg flexors were stretched using 3 unassisted and 1 assisted static stretching exercises (each 4x15 seconds; 10-second rest). After the stretching, isokinetic tests were repeated on both legs.
The results indicated a positive increase in strength in the stretched (PT%BW, TW) and non-stretched (PT, PT%BW, TW) limbs in flexion at 180°s-1 (P<0.05). We observed a positive increase (P<0.05) in the stretched limb (180 and 300°.s-1, TW; 300°.s-1, PT%BW) in extension whereas an acute decrease (P<0.05) was observed in both legs (60˚.s-1, PT and PT%BW).
Our findings indicated a possible positive effect of static stretching at high angular velocities on the strength production of isokinetic contraction in stretched and non-stretched muscles. However, due to its negative effect on the extensor muscle groups, we think using static stretching is required attention before maximal strength exercises.
本研究旨在探讨对现代舞者优势腿屈肌肌群进行静态拉伸，对其在60、180和300°·s⁻¹角速度下，拉伸侧和未拉伸侧肢体的等速向心伸膝和屈膝峰值扭矩（PT）、峰值扭矩占体重百分比（PT%BW）以及总功（TW）的急性影响。
26名训练有素的现代舞者自愿参与本研究。第一次测量时，对优势腿和非优势腿进行等速测试。第二次测量时，使用3种无辅助和1种辅助的静态拉伸练习（每种练习4×15秒，休息10秒）对优势腿屈肌进行拉伸。拉伸后，再次对双腿进行等速测试。
结果表明，在180°·s⁻¹的屈膝运动中，拉伸侧（PT%BW、TW）和未拉伸侧（PT、PT%BW、TW）肢体的力量均有正向增加（P<0.05）。在伸展运动中，我们观察到拉伸侧肢体（180和300°·s⁻¹，TW；300°·s⁻¹，PT%BW）有正向增加（P<0.05），而在双腿的60°·s⁻¹运动中，观察到急性下降（P<0.05）（PT和PT%BW）。
我们的研究结果表明，在高角速度下进行静态拉伸，可能对拉伸和未拉伸肌肉的等速收缩力量产生有积极影响。然而，由于其对伸肌肌群有负面影响，我们认为在进行最大力量训练前，使用静态拉伸需要谨慎。
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