Title

Interactive effects of joint angle, contraction state and method on estimates of achilles tendon moment arms

Document Type

Journal Article

Publisher

Human Kinetics Inc

Faculty

Faculty of Health, Engineering and Science

School

School of Exercise and Health Sciences/Centre for Exercise and Sports Science Research

RAS ID

17002

Comments

This article was originally published as: Fath, F., Blazevich, A. J., Waugh, C., Miller, S., & Korff, T. (2013). Interactive effects of joint angle, contraction state and method on estimates of achilles tendon moment arms. Journal of Applied Biomechanics, 29(2), 241-244. Original article available here

Abstract

The muscle-tendon moment arm is an important input parameter for musculoskeletal models. Moment arms change as a function of joint angle and contraction state and depend on the method being employed. The overall purpose was to gain insights into the interactive effects of joint angle, contraction state and method on the Achilles tendon moment arm using the center of rotation (COR) and the tendon excursion method (TE). Achilles tendon moment arms were obtained at rest (TErest, CORrest) and during a maximum voluntary contraction (CORMVC) at four angles. We found strong correlations between TErest and CORMVC for all angles (.72 ≤ r ≤ .93) with Achilles tendon moment arms using CORMVC being 33-36% greater than those obtained from TErest. The relationship between Achilles tendon moment arms and angle was similar across both methods and both levels of muscular contraction. Finally, Achilles tendon moment arms for CORMVC were 1-8% greater than for CORrest.

Share

 
COinS