Muscular recruitment is associated with muscular function and swelling following eccentric contractions of human elbow flexors
Muscular recruitment is associated with muscular function and swelling following eccentric contractions of human elbow flexors
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DOI：
10.23736/s0022-4707.18.09102-8
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发表时间：
2019-07-01
影响因子：
1.7
通讯作者：
Ochi, Eisuke
中科院分区：
文献类型：
--
作者：
Tsuchiya, Yosuke;Ueda, Hisashi;Ochi, Eisuke
背景技术背景：本研究探讨了肌纤维募集与等张离心收缩（ECCs）引起的肌肉损伤程度之间的关系。方法：本研究招募了10名健康男性（年龄：27.2 +/- 6.0岁，身高：174.0 +/- 5.3 cm，体重70.1 +/- 2.1 kg）。受试者使用调整到40%和80%的哑铃进行30次手肘屈肌ECC，每个人最多重复一次。在每次运动前即刻、运动后即刻和运动后1、3、5 d测量因变量最大自主等长收缩（MVC）扭矩、运动范围（ROM）、延迟性肌肉酸痛（DOMS）、横截面积（CSA）和磁共振成像（MRI）的横向弛豫时间（T2）。80%组MVC下降和ROM受限明显大于40%组（P
BACKGROUND: This study investigated the relationship between muscle fiber recruitment and the magnitude of muscle damage by isotonic eccentric contractions (ECCs).METHODS: Ten healthy men (age: 27.2 +/- 6.0 y, height: 174.0 +/- 5.3 cm, body mass 70.1 +/- 2.1 kg) were recruited in this study. Subjects performed 30 ECCs of the elbow flexors using a dumbbell adjusted to 40% and 80% one repetition maximum of each individual. The dependent variables maximal voluntary isometric contraction (MVC) torque, Range of Motion (ROM), delayed onset muscle soreness (DOMS), cross-sectional area (CSA) and transverse relaxation time (T2) of magnetic resonance imaging (MRI) were measured immediately before, immediately after and 1, 3, and 5 days after each exercise.RESULTS: The decreased MVC and limited ROM were significantly greater for 80% than that 40% (P