@article{oai:kanazawa-u.repo.nii.ac.jp:00055612,
 author = {西川, 裕一 and Nishikawa, Yuichi and Watanabe, Kohei and Takahashi, Tetsuya and Maeda , Noriaki and Maruyama, Hirofumi and Kimura, Hiroaki},
 issue = {10},
 journal = {European Journal of Sport Science},
 month = {Oct},
 note = {The aim of the present study was to clarify the effect of electrical muscle stimulation (EMS) on the spatial distribution pattern of electromyographic activity in healthy young adults using multi-channel surface electromyography (SEMG). A total of 32 men (age = 21–26 years) were randomly assigned to the intervention group (n = 18) and control group (n = 14). Participants in the intervention group performed EMS to stimulate the bilateral lower limb muscle for four weeks (20 min/3 days/week). The control group received no EMS intervention. To understand the effects of EMS, the following measurements were made at baseline and four weeks: knee extension torque, muscle mass, and spatial distribution of neuromuscular activation during a target torques [10%, 30%, 50%, and 70% of the maximal voluntary contraction (MVC)] using multi-channel SEMG. The knee extension torque was significantly increased in intervention group compared with control group (p < 0.0001). However, the muscle mass did not show a significant difference between pre and post intervention in each group. The muscle activation patterns of 50% and 70% MVC task showed significant enhancement between baseline and four weeks in the intervention group. Furthermore, a moderate correlation between Δ knee extension torque and Δ spatial distribution pattern of electromyographic activity of 50% and 70% MVC in the intervention group was observed. These results suggested EMS intervention induced different distribution of muscle activity at high-intensity muscle contraction compared with low-intensity muscle contraction. Highlights The electrical muscle stimulation (EMS) interventions can improve muscle performance and muscle thickness, but the influence on neuromuscular activation is unknown. Participants performed EMS to stimulate the bilateral lower limb. EMS intervention induced alter motor unit recruitment pattern. © 2020 European College of Sport Science., Embargo Period 12 months, 金沢大学理工研究域フロンティア工学系},
 pages = {1414--1422},
 title = {The effect of electrical muscle stimulation on quadriceps muscle strength and activation patterns in healthy young adults},
 volume = {21},
 year = {2021}
}