Eccentric exercise causes delayed sensory nerve conduction velocity but no repeated bout effect in the flexor pollicis brevis muscles
Eccentric exercise causes delayed sensory nerve conduction velocity but no repeated bout effect in the flexor pollicis brevis muscles
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DOI：
10.1007/s00421-021-04773-7
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发表时间：
2021-07-27
影响因子：
3
通讯作者：
Nakazato, Koichi
中科院分区：
文献类型：
--
作者：
Ochi, Eisuke;Ueda, Hisashi;Nakazato, Koichi
目的研究拇短屈肌离心收缩（ECCs）对运动和感觉神经功能的影响，以及ECCs后运动和感觉神经传导速度的同侧和对侧重复回合效应（IL-RBE）。方法32名健康青年男性（年龄：19.6 ± 0.2岁，身高：173.2 ± 1.2 cm，体质量：69.7 ± 1.9 kg）进行了两次ECC。在第一次ECC回合（ECC-1）中，所有参与者用单手进行100次ECC;对于第二回合，3组（2周[W]：n = 11，4 W：n = 10，8 W：n = 11）在ECC-1后2，4或8周用双手进行ECC。分别于ECC前、ECC后即刻、ECC后1、2、3、5 d测定最大自主等长收缩（MVC）、关节活动度（ROM）、疼痛视觉模拟评分（VAS）、运动和感觉神经传导速度。结果ECCs-1组与对照组相比，运动手的最大运动量（MVC）、活动度（ROM）、视觉模拟评分（VAS）、运动神经传导速度和感觉神经传导速度均明显降低（p < 0.05）。IL-RBE在2 W和4 W的ROM、IL-RBE在2 W的VAS、CL-RBE在2 W的ROM和VAS中观察到重复回合效应（p < 0.05）。然而，没有观察到MVC以及运动和感觉神经传导速度的RBE，并且没有确认取决于间隔的差异。结论在本研究中，FPBM的ECC引起感觉神经功能障碍，而未观察到IL-或CL-RBE。
Purpose This study was aimed at investigating the effect of eccentric contractions (ECCs) of flexor pollicis brevis muscles (FPBMs) on motor and sensory nerve functions as well as the ipsilateral repeated bout effect (IL-RBE) and contralateral (CL)-RBE of motor and sensory nerve conduction velocities following ECCs. Methods Thirty-two young healthy men (age: 19.6 +/- 0.2 years, height: 173.2 +/- 1.2 cm, body mass: 69.7 +/- 1.9 kg) performed two bouts of ECCs. During the first ECCs bout (ECCs-1), all participants performed 100 ECCs with 1 hand; for the second bout, 3 groups (2 weeks [W]: n = 11, 4W: n = 10, 8W: n = 11) performed ECCs with both hands 2, 4, or 8 weeks after ECCs-1. The maximal voluntary isometric contraction (MVC), range of motion (ROM), visual analog scale for pain (VAS), motor and sensory nerve conduction velocities were measured before, immediately after, and 1, 2, 3, and 5 days after ECCs. Results ECCs-1 decreased the MVC, limited the ROM, developed VAS, and decreased the motor and sensory nerve conduction velocities compared to non-exercise hand (p < 0.05). The repeated bout effect was observed in the ROM for IL-RBE in 2W and 4W, VAS for IL-RBE in 2 W, and ROM and VAS for CL-RBE in 2W (p < 0.05). However, RBEs of MVC and motor and sensory nerve conduction velocities were not observed, and no differences were confirmed depending on the interval. Conclusion In the present study, ECCs of the FPBM caused a sensory nerve dysfunction, while IL- or CL-RBE was not observed.