1 Research Paper Compensatory Strategies during Manual Wheelchair Propulsion in Response to Weakness in Individual Muscle Groups: A Simulation Study Jonathan S. Slowik a , Jill L. McNitt-Gray b,c , Philip S. Requejo d,e , Sara J. Mulroy d and Richard R. Neptune a a Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, USA b Department of Biomedical Engineering, The University of Southern California, Los Angeles, CA, USA c Department of Biological Sciences, The University of Southern California, Los Angeles, CA, USA d Pathokinesiology Laboratory, Rancho Los Amigos National Rehabilitation Center, Downey, CA, USA e Rehabilitation Engineering, Rancho Los Amigos National Rehabilitation Center, Downey, CA, USA Revised Manuscript Submitted to: Clinical Biomechanics February 2016 Address correspondence to: Richard R. Neptune, PhD Department of Mechanical Engineering The University of Texas at Austin 204 E. Dean Keeton Street, Stop C2200 Austin, TX 78712, USA Email: rneptune@mail.utexas.edu Tel: 512-471-0848 Fax: 512-471-8727 Keywords: Wheelchair propulsion; forward dynamics simulation; musculoskeletal model; muscle weakness; muscle fatigue; biomechanics © 2016. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/