Human Performance Laboratory, Department of Kinesiology, California State University - San Bernardino, San Bernardino, California, USA.
Scand J Med Sci Sports. 2013 Feb;23(1):38-45. doi: 10.1111/j.1600-0838.2011.01348.x. Epub 2011 Jun 15.
Recent evidence has shown acute static stretching may decrease hamstring-to-quadriceps (H:Q) ratios. However, the effects of static stretching on the functional H:Q ratio, which uses eccentric hamstrings muscle actions, have not been investigated. This study examined the acute effects of hamstrings and quadriceps static stretching on leg extensor and flexor concentric peak torque (PT), leg flexor eccentric PT, and the conventional and functional H:Q ratios. Twenty-two women (mean ± SD age=20.6 ± 1.9 years; body mass=64.6 ± 9.1 kg; height=164.5 ± 6.4 cm) performed three maximal voluntary unilateral isokinetic leg extension, flexion, and eccentric hamstring muscle actions at the angular velocities of 60 and 180°/s before and after a bout of hamstrings, quadriceps, and combined hamstrings and quadriceps static stretching, and a control condition. Two-way repeated measures ANOVAs (time × condition) were used to analyze the leg extension, flexion, and eccentric PT as well as the conventional and functional H:Q ratios. Results indicated that when collapsed across velocity, hamstrings-only stretching decreased the conventional ratios (P<0.05). Quadriceps-only and hamstrings and quadriceps stretching decreased the functional ratios (P<0.05). These findings suggested that stretching may adversely affect the conventional and functional H:Q ratios.
最近的证据表明，急性静态伸展可能会降低腘绳肌与四头肌（H:Q）的比例。然而，静态伸展对使用离心腘绳肌肌肉活动的功能性 H:Q 比例的影响尚未得到研究。本研究检查了腘绳肌和四头肌静态伸展对腿部伸肌和屈肌向心峰值扭矩（PT）、腿部屈肌离心 PT 以及常规和功能性 H:Q 比例的急性影响。22 名女性（平均 ± 标准差年龄=20.6 ± 1.9 岁；体重=64.6 ± 9.1 公斤；身高=164.5 ± 6.4 厘米）在进行一次腘绳肌、四头肌和股四头肌联合静态伸展以及对照条件之前和之后，以 60 和 180°/s 的角速度进行了三次最大自愿单侧等速腿部伸展、弯曲和离心腘绳肌肌肉动作。使用双向重复测量方差分析（时间×条件）来分析腿部伸展、弯曲和离心 PT 以及常规和功能性 H:Q 比例。结果表明，当跨速度合并时，仅伸展腘绳肌会降低常规比例（P<0.05）。仅伸展四头肌和伸展腘绳肌和四头肌会降低功能性比例（P<0.05）。这些发现表明，伸展可能会对常规和功能性 H:Q 比例产生不利影响。
