Electrical Stimulation to the Infraspinatus on Hypertrophy and Strength of the Shoulder

Ko Yanase; Satoshi Hasegawa; Masatoshi Nakamura; Taishi Yamauchi; Satoru Nishishita; Kojiro Araki; Jun Umehara; Kosuke Fujita; Ikuya Sato; Satoko Ibuki; Noriaki Ichihashi

doi:10.1055/s-0044-102129

International Journal of Sports Medicine, Inhaltsverzeichnis

Int J Sports Med 2018; 39(11): 828-834
DOI: 10.1055/s-0044-102129

Training & Testing

Electrical Stimulation to the Infraspinatus on Hypertrophy and Strength of the Shoulder

Autor*innen

Ko Yanase

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Satoshi Hasegawa

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Masatoshi Nakamura

²Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan 1398, Shimamicho, Kita-ku Niigata-shi, Niigata, 950-3102, Japan
Taishi Yamauchi

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Satoru Nishishita

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Kojiro Araki

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Jun Umehara

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Kosuke Fujita

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Ikuya Sato

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Satoko Ibuki

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan
Noriaki Ichihashi

¹Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan 53, Shogoin Kawaharacho, Sakyo-ku Kyoto-shi, Kyoto, 606-8507, Japan

Abstract

The purpose of this study was to determine the effects of six weeks of electrical muscle stimulation (EMS) on the strength and muscle mass of the infraspinatus muscle. Twenty non-athletes (age: 24±3.4 years, height: 171.5±5.6 cm, mass: 65.2±8.1 kg) were randomly classified into two groups, an electrical muscle stimulation group (EMS group) and a control group (CON group). The EMS group completed a total of 18 20– min EMS sessions, three times per week over a period of six weeks, while the CON group received no intervention. The muscle thicknesses of both the infraspinatus and the deltoid muscles, the cross-sectional area (CSA) of the whole infraspinatus muscle, and the isometric and isokinetic peak torques of shoulder external rotations were measured before and after intervention. It was found that the muscle thickness of the superior infraspinatus (Pre 0.92±0.19 cm², Post 0.99±0.16 cm², p=0.02) and the CSA (Pre 10.99±1.32 cm², Post 11.99±1.02 cm², p=0.03) significantly increased in the EMS group. This study demonstrated that EMS of the infraspinatus muscle over a period of six weeks resulted in hypertrophy of the infraspinatus muscle.

Key words

electrical muscle stimulation - training - infraspinatus - hypertrophy - shoulder - strength

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Referenzen

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