Department of Rehabilitation, Kobe Century Memorial Hospital, Kobe, Japan.
Program in Physical and Occupational Therapy, Graduate School of Medicine, Nagoya University, Nagoya, Japan.
J Strength Cond Res. 2017 Dec;31(12):3403-3410. doi: 10.1519/JSC.0000000000001752.
Kataura, S, Suzuki, S, Matsuo, S, Hatano, G, Iwata, M, Yokoi, K, Tsuchida, W, Banno, Y, and Asai, Y. Acute effects of the different intensity of static stretching on flexibility and isometric muscle force. J Strength Cond Res 31(12): 3403-3410, 2017-In various fields, static stretching is commonly performed to improve flexibility, whereas the acute effects of different stretch intensities are unclear. Therefore, we investigated the acute effects of different stretch intensities on flexibility and muscle force. Eighteen healthy participants (9 men and 9 women) performed 180-second static stretches of the right hamstrings at 80, 100, and 120% of maximum tolerable intensity without stretching pain, in random order. The following outcomes were assessed as markers of lower limb function and flexibility: static passive torque (SPT), range of motion (ROM), passive joint (muscle-tendon) stiffness, passive torque (PT) at onset of pain, and isometric muscle force. Static passive torque was significantly decreased after all stretching intensities (p ≤ 0.05). Compared with before stretching at 100 and 120% intensities, ROM and PT were significantly increased after stretching (p ≤ 0.05), and passive stiffness (p = 0.05) and isometric muscle force (p ≤ 0.05) were significantly decreased. In addition, ROM was significantly greater after stretching at 100 and 120% than at 80%, and passive stiffness was significantly lower after 120% than after 80% (p ≤ 0.05). However, all measurements except SPT were unchanged after 80% intensity. There was a weak positive correlation between the intensities of stretching and the relative change for SPT (p ≤ 0.05), a moderate positive correlation with ROM (p ≤ 0.05), and a moderate positive correlation with passive stiffness (p ≤ 0.05). These results indicate that static stretching at greater intensity is more effective for increasing ROM and decreasing passive muscle-tendon stiffness.
Kataura 等人，2017 年，《力量与调节研究杂志》第 31 卷第 12 期：不同强度的静态拉伸对柔韧性和等长肌肉力量的急性影响。在不同领域，静态拉伸通常被用来提高柔韧性，而不同拉伸强度的急性影响尚不清楚。因此，我们研究了不同拉伸强度对柔韧性和肌肉力量的急性影响。18 名健康参与者（9 名男性和 9 名女性）以 80%、100%和 120%的最大耐受强度，无拉伸疼痛，随机顺序对右侧腿筋进行 180 秒的静态拉伸。以下是评估下肢功能和柔韧性的标志物：静态被动扭矩（SPT）、关节活动度（ROM）、被动关节（肌肉-肌腱）刚度、疼痛起始时的被动扭矩（PT）和等长肌肉力量。所有拉伸强度后 SPT 均显著降低（p≤0.05）。与 100%和 120%强度拉伸前相比，拉伸后 ROM 和 PT 显著增加（p≤0.05），被动刚度（p=0.05）和等长肌肉力量（p≤0.05）显著降低。此外，100%和 120%拉伸后 ROM 显著大于 80%，120%拉伸后被动刚度显著小于 80%（p≤0.05）。然而，80%强度拉伸后除 SPT 外所有测量值均无变化。拉伸强度与 SPT 的相对变化呈弱正相关（p≤0.05），与 ROM 呈中度正相关（p≤0.05），与被动刚度呈中度正相关（p≤0.05）。这些结果表明，较大强度的静态拉伸更有利于增加 ROM 和降低被动肌肉-肌腱的僵硬度。
