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Title: Interactive effects of joint angle, contraction state and method on estimates of achilles tendon moment arms
Authors: Fath, F;Blazevich, AJ;Waugh, CM;Miller, SC;Korff, T
Keywords: Achilles Tendon;Ankle Joint;Biomechanics;Female;Humans;Male;Movement;Muscle Contraction;Muscle, Skeletal;Range of Motion, Articular;Rotation
Issue Date: 2013
Publisher: Human Kinetics
Description: Copyright @ 2013 Human Kinetics, Inc
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 COR(rest).
Engineering and Physical Sciences Research Council, UK (EPSRC Reference:EP/E013007/1).
Other Identifiers: Journal of Applied Biomechanics, 29(2), 241 - 244, Apr 2013
Appears in Collections:Dept of Life Sciences Research Papers

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