Elucidation of the mechanisms of force potentiation by stretch-shortening cycle with newly developed device

2015 Fiscal Year Final Research Report

• Project/Area Number: 26750313
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Ritsumeikan University
• Principal Investigator: Fukutani Atsuki 立命館大学, 総合科学技術研究機構, 特別研究員(PD) (80722644)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 筋 / 腱 / 弾性エネルギー / 反動動作

Outline of Final Research Achievements

The purpose of this study was to clarify the following question; which parameters contribute to the stretch-shortening cycle effect focused on the tendon elongation, preactivation, active-lengthening induced force potentiation. To archive this purpose, we set following three steps. First, muscle contraction was evoked by electrical stimulation to discard the influence of neural activity. Second, we compared the stretch-shortening cycle effect between “muscle with tendon” and “muscle without tendon” while the other factors were constant. Finally, we compared the extent of stretch-shortening cycle effect between “active-lengthening” and “no active-lengthening” conditions. As a result, even without tendon, substantial stretch-shortening cycle effect occurred, indicating that the contribution of tendon elongation is small. Second, both preactivation and residual force enhancement contribute to stretch-shortening cycle effect.

Free Research Field

運動生理学