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Title: Are joint torque models limited by an assumption of monoarticularity?
Authors: Lewis, Martin G.C.
King, Mark A.
Yeadon, Maurice R.
Conceicao, Filipe
Keywords: Computer simulation
Joint torque
Biarticular muscle
Issue Date: 2012
Publisher: © Human Kinetics
Citation: LEWIS, M.G.C. ... et al., 2012. Are joint torque models limited by an assumption of monoarticularity? Journal of Applied Biomechanics, 28 (5), pp. 520 - 529.
Abstract: This study determines whether maximal voluntary ankle plantar flexor torque could be more accurately represented using a torque generator that is a function of both knee and ankle kinematics. Isovelocity and isometric ankle plantar flexor torques were measured on a single participant for knee joint angles of 111° to 169° (approximately full extension) using a Contrex MJ dynamometer. Maximal voluntary torque was represented by a 19-parameter two-joint function of ankle and knee joint angles and angular velocities with the parameters determined by minimizing a weighted root mean square difference between measured torques and the two-joint function. The weighted root mean square difference between the two-joint function and the measured torques was 10 N-m or 3% of maximum torque. The two-joint function was a more accurate representation of maximal voluntary ankle plantar flexor torques than an existing single-joint function where differences of 19% of maximum torque were found. It is concluded that when the knee is flexed by more than 40°, a two-joint representation is necessary.
Description: This article was published in the Journal of Applied Biomechanics [© Human Kinetics]. The definitive version is available at: http://hk.humankinetics.com/JAB/journalAbout.cfm
Version: Published
URI: https://dspace.lboro.ac.uk/2134/11399
Publisher Link: http://journals.humankinetics.com/jab-current-issue/jab-volume-28-issue-5-november/are-joint-torque-models-limited-by-assumption-of-monoarticularity
ISSN: 1065-8483
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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