每日 3 秒最大自主等长收缩、向心收缩或离心收缩对肘屈肌力量的影响,Scandinavian Journal of Medicine & Science in Sports

当前位置： X-MOL 学术 › Scand. J. Med. Sci. Sports › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

每日 3 秒最大自主等长收缩、向心收缩或离心收缩对肘屈肌力量的影响
Scandinavian Journal of Medicine & Science in Sports ( IF 3.5 ) Pub Date : 2022-02-01 , DOI: 10.1111/sms.14138
Shigeru Sato _{1,

2} , Riku Yoshida ₁ , Fu Murakoshi ₃ , Yuto Sasaki ₃ , Kaoru Yahata ₁ , Kazunori Nosaka ₄ , Masatoshi Nakamura ₁

Affiliation

本研究比较了肘屈肌的 3 秒等长最大自主收缩 (MVC)、向心 MVC 和偏心 MVC，每周 5 天，连续 4 周，每天进行一次，以了解肌肉力量和厚度的变化。年轻久坐不动的人被分配到三个训练组之一（每组n = 13），每天一次进行 3 秒等长、同心或离心 MVC，持续 20 天，或者分配到一个对照组（n = 10) 未经训练就进行了测量。等长组参与者在 55° (0.96 rad) 屈肘时进行等长 MVC，同心或偏心组参与者在 10° (0.17 rad) 和 100° (1.75 rad) 肘屈曲之间进行同心 MVC 或偏心 MVC在等速测力计上为 30°/s (0.52 rad/s)。20° (0.35 rad)、55° (0.96 rad) 和 90° (1.57 rad) 肘屈曲时的 MVC 等距扭矩，30°/s (0.52 rad/s) 和 180°/s (在第 20 次锻炼之前和之后几天测量肱二头肌和肱肌的 3.14 rad/s) 和肌肉厚度 (MT)。对照组没有任何变化。偏心组显示增加（p < 0.01) 等距（三个角度平均值：10.2 ± 6.4%）、同心（两个速度平均值：12.8 ± 9.6%）和偏心 MVC 扭矩（12.2 ± 7.8%）。同心组的等长 MVC 扭矩 (6.3 ± 6.0%) 和等长组的偏心 MVC 扭矩 (7.2 ± 4.4%)的增加 ( p < 0.05) 受到限制。所有组的 MT 没有明显变化。每天执行一次 3 秒 MVC 会增加肌肉力量，但离心 MVC 产生的效果比等长或同心 MVC 更有效。

"点击查看英文标题和摘要"

Effect of daily 3-s maximum voluntary isometric, concentric, or eccentric contraction on elbow flexor strength

The present study compared a 3-s isometric maximal voluntary contraction (MVC), concentric MVC and eccentric MVC of the elbow flexors performed daily for 5 days a week for 4 weeks for changes in muscle strength and thickness. Young sedentary individuals were assigned to one of three training groups (n = 13 per group) that performed either 3-s isometric, concentric, or eccentric MVC once a day for 20 days, or to a control group (n = 10) that had measurements without training. The participants in the isometric group performed isometric MVC at 55° (0.96 rad) elbow flexion, and those in the concentric or eccentric group performed concentric MVC or eccentric MVC between 10° (0.17 rad) and 100° (1.75 rad) elbow flexion at 30°/s (0.52 rad/s) on an isokinetic dynamometer. MVC isometric torque at 20° (0.35 rad), 55° (0.96 rad), and 90° (1.57 rad) elbow flexion, MVC concentric and eccentric torque at 30°/s (0.52 rad/s) and 180°/s (3.14 rad/s), and muscle thickness (MT) of biceps brachii and brachialis were measured before and several days after the 20th exercise session. The control group did not show any changes. The eccentric group showed increases (p < 0.01) in isometric (three angle average: 10.2 ± 6.4%), concentric (two velocity average: 12.8 ± 9.6%), and eccentric MVC torque (12.2 ± 7.8%). An increase (p < 0.05) was limited for isometric MVC torque (6.3 ± 6.0%) in the concentric group, and for eccentric MVC torque (7.2 ± 4.4%) in the isometric group. No significant changes in MT were evident for all groups. Performing one 3-s MVC a day increased muscle strength, but eccentric MVC produced more potent effects than isometric or concentric MVC.

更新日期：2022-02-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南