Muscle hardness of the triceps brachii before and after a resistance exercise session: a shear wave ultrasound elastography study
Muscle hardness of the triceps brachii before and after a resistance exercise session: a shear wave ultrasound elastography study
复制标题
DOI：
10.1177/0284185114559765
复制
发表时间：
2015-12-01
期刊：
影响因子：
1.3
通讯作者：
Takahashi, Hideyuki
中科院分区：
文献类型：
--
作者：
Akagi, Ryota;Tanaka, Jun;Takahashi, Hideyuki
工作背景：肌肉硬度反映肌肉状况，在抗阻训练前后测量肌肉硬度对于预防抗阻训练引起的肌肉损伤是必不可少的。目的：研究手肘伸肌抗阻训练前后肱三头肌（TB）的肌肉硬度。材料与方法：应用剪切波超声弹性成像技术，对18例青年男性肱骨外上髁至肩胛骨肩峰之间上臂长沿着50%、60%、70%点的TB长头肌进行了测量。在同一部位，还用超声测量了TB长头的肌肉厚度。阻力练习进行调整到80%的一个重复maximum.Results的质量使用哑铃：虽然运动引起的肌肉硬度的增加是显着的，在所有的区域，肌肉硬度显着高于70%的上臂长度比在其他地区之前和之后的阻力练习。运动引起的肌肉厚度的增加也是显着的，但肌肉硬度的相对变化之前和之后的阻力运动与肌肉厚度在每个区域的相应的相对变化不相关。这些结果表明，运动引起的肌肉肿胀运动引起的肌肉hardness.Conclusion的变化的影响很小：我们建议，肌肉损伤和/或损伤，特别是在远端区域的TB，应仔细考虑安全地进行阻力练习。
Background: Muscle hardness indicates muscle condition, and its measurement before and after resistance exercise is essential for preventing resistance training-induced muscle injury.Purpose: To investigate muscle hardness of the triceps brachii (TB) before and immediately after a resistance exercise session involving the elbow extensors.Material and Methods: In 18 young men, muscle hardness of the long head of TB was measured at 50%, 60%, and 70% point along the length of the upper arm from the acromial process of the scapula to the lateral epicondyle of the humerus by using shear wave ultrasound elastography. At the same sites, muscle thickness of the long head of TB was also measured by ultrasonography. Resistance exercise was performed using a dumbbell with a mass adjusted to 80% of the one-repetition maximum.Results: Although the exercise-induced increase in muscle hardness was significant at all the regions, muscle hardness was significantly higher at 70% of the upper arm length than at the other regions before and after resistance exercise. The exercise-induced increase in muscle thickness was also significant, but the relative changes in muscle hardness before and after resistance exercise were not correlated with the corresponding relative changes in muscle thickness at each region. These results indicate the small effect of exercise-induced muscle swelling on exercise-induced changes in muscle hardness.Conclusion: We suggest that muscle damage and/or injury, particularly at the distal region of TB, should be carefully considered to safely perform resistance exercise.