Acute changes in passive stiffness of the individual hamstring muscles induced by resistance exercise: effects of muscle length and exercise duration
Acute changes in passive stiffness of the individual hamstring muscles induced by resistance exercise: effects of muscle length and exercise duration
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抗阻运动引起的个体腘绳肌被动僵硬的急性变化：肌肉长度和运动持续时间的影响
DOI：
10.1007/s00421-022-05092-1
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发表时间：
2023
影响因子：
3
通讯作者：
Wakahara Taku
中科院分区：
文献类型：
--
作者：
Kawama Raki;Hojo Tatsuya;Wakahara Taku
目的先前的研究表明，具有偏心收缩和大范围运动（ROM）的阻力运动可以急剧降低特定肌肉的肌肉僵硬度。为了进一步探索降低僵硬度的方法，我们研究了不同肌肉长度和运动时间组合的单偏心阻力运动后单个腘绳肌被动僵硬度的急性变化。方法：13名健康的年轻男性参与者在不同的天进行了3次仅偏心运动，包括不同肌肉长度和运动持续时间（每次重复持续时间×总重复次数）的硬腿硬举，如下：(1)短肌肉长度和短持续时间（SS）；(2)肌长持续时间短（LS）；(3)肌肉长度长，持续时间长（LL）。在每次训练前、每次训练后3、30和60分钟分别测量最大关节ROM、被动扭矩、每条腘绳肌的剪切模量和膝关节屈曲的最大等距扭矩。结果运动后3 min，大鼠半膜剪切模量（129.8±22.7 kPa）明显低于运动前（140.5±19.1 kPa,p< 0.01），而大鼠半膜剪切模量与大鼠半膜剪切模量无显著差异。在运动前和运动后3分钟，未观察到股二头肌长头或半腱肌的剪切模量有显著差异。结论在单偏心阻力运动中，长肌肉长度和长时间的结合对立即降低特定肌肉的刚度（剪切模量）很重要。
PurposeA previous study revealed that resistance exercise with eccentric contraction and a wide range of motion (ROM) can acutely decrease muscle stiffness of a specific muscle. To explore further approaches to decrease the stiffness, we examined the acute changes in passive stiffness of the individual hamstring muscles after eccentric-only resistance exercise with different combinations of muscle lengths and exercise durations.MethodsThirteen healthy young male participants performed three sessions of eccentric-only exercises that comprised stiff-leg deadlift with different muscle lengths and exercise durations (duration per repetition × the total number of repetitions) on separate days as follows: (1) short muscle lengths with a short duration (SS); (2) long muscle lengths with a short duration (LS); and (3) long muscle lengths with a long duration (LL). Maximal joint ROM, passive torque, shear modulus of each hamstring muscle, and maximal isometric torque of knee flexion were measured before, and at 3, 30, and 60 min after each session.ResultsThe shear modulus of the semimembranosus was significantly lower at 3 min post-exercise (129.8 ± 22.7 kPa) than at pre-exercise (140.5 ± 19.1 kPa,p< 0.01) in LL, but not in SS or LS. No significant differences were observed in the shear moduli of the biceps femoris long head or semitendinosus between pre-exercise and 3 min post-exercise in any session.ConclusionThe combination of long muscle lengths and a long duration during eccentric-only resistance exercise is important to immediately decrease the stiffness (shear modulus) of a specific muscle.
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影响因子：
3
作者：
Freitas, Sandro R.;Andrade, Ricardo J.;Nordez, Antoine
通讯作者：
Nordez, Antoine
北欧腘绳肌运动联合滑翔运动对髋关节屈曲柔韧性和腘绳肌被动僵硬的影响
DOI：
--
发表时间：
2021
期刊：
Jurnal sport science
影响因子：
--
作者：
Rok Vatovec;J. Marušič;G. Marković;N. Šarabon
通讯作者：
N. Šarabon
影响因子：
4.1
作者：
J. Fridén;J. Fridén;R. Lieber;R. Lieber
通讯作者：
J. Fridén;J. Fridén;R. Lieber;R. Lieber
运动前肌肉僵硬与离心运动引起的肌肉损伤的关系
影响因子：
3.2
作者：
Jingfei Xu;S. Fu;Dong Zhou;Chen Huang;F. Hug
通讯作者：
F. Hug
影响因子：
1.7
作者：
Caliskan, Emine;Akkoc, Orkun;Adaletli, Ibrahim
通讯作者：
Adaletli, Ibrahim