The effect of accounting for biarticularity in hip flexor and hip extensor joint torque representations

Lewis, M.G.C. ORCID: 0000-0001-5918-3444, Yeadon, M.R. and King, M.A., 2017. The effect of accounting for biarticularity in hip flexor and hip extensor joint torque representations. Human Movement Science. ISSN 0167-9457

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Subject-specific torque-driven models have ignored biarticular effects at the hip. The aim of this study was to establish the contribution of monoarticular hip flexors and hip extensors to total hip flexor and total hip extensor joint torques for an individual and to investigate whether torque-driven simulation models should consider incorporating biarticular effects at the hip joint. Maximum voluntary isometric and isovelocity hip flexion and hip extension joint torques were measured for a single participant together with surface electromyography. Single-joint and two-joint representations were fitted to the collected torque data and used to determine the maximum voluntary joint torque capacity. When comparing two-joint and single-joint representations, the single-joint representation had the capacity to produce larger maximum voluntary hip flexion torque (larger by around 9% of maximum torque) and smaller maximum voluntary hip extension torque (smaller by around 33% of maximum torque) with the knee extended. Considering the range of kinematics found for jumping movements, the single-joint hip flexors had the capacity to produce around 10% additional torque, while the single joint hip extensors had about 70% of the capacity of the two-joint representation. Two-joint representations may overcome an over-simplification of single-joint representations by accounting for biarticular effects, while building on the strength of determining subject-specific parameters from measurements on the participant.

Item Type: Journal article
Publication Title: Human Movement Science
Creators: Lewis, M.G.C., Yeadon, M.R. and King, M.A.
Publisher: Elsevier
Date: 7 October 2017
ISSN: 0167-9457
S0167945717302464Publisher Item Identifier
Divisions: Schools > School of Science and Technology
Record created by: Jonathan Gallacher
Date Added: 08 Jan 2018 16:35
Last Modified: 08 Jan 2018 16:35

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