Acute and chronic effects of muscle hardness changes on muscle force production

2014 Fiscal Year Final Research Report

• Project/Area Number: 24700689
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Shibaura Institute of Technology (2013-2014); National Agency for the Advancement of Sports and Health (2012)
• Principal Investigator: AKAGI Ryota 芝浦工業大学, システム理工学部, 助教 (20581458)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 筋硬度 / ストレッチング / レジスタンスエクササイズ / 超音波エラストグラフィ / 下腿三頭筋 / 上腕三頭筋

Outline of Final Research Achievements

In this study, acute and chronic effects of muscle hardness changes induced by stretching or resistance training on muscle force production were investigated. The static stretching of the triceps surae decreased the hardness of the gastrocnemius muscle both temporarily and chronically, but did not change the plantar flexion strength. The resistance training of the elbow extensors increased the triceps brachii hardness temporarily, but the muscle hardness was not changed before and after the 6-week training program. On the other hand, the resistance training increased the elbow extension strength significantly. Thus, it is suggested that the changes in muscle hardness induced by stretching or resistance training do not correspond to that in muscle force production.

Free Research Field

バイオメカニクス，運動生理学