Ankle and knee moment and power adaptations are elicited through load carriage conditioning in males |
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| Institution: | 1. Department of Health Professions, Faculty of Medicine and Health Sciences, Macquarie University, Australia;2. Griffith Centre for Biomedical and Rehabilitation Engineering, Menzies Health Institute Queensland, School of Allied Health Sciences, Griffith University, Australia;1. Direction de l?education physique et du sport militaire, Bardo, Tunis, Tunisie;2. Institut supérieur du sport et de l?education physique, Ksar-Said, Tunis, Tunisie;3. Centre militaire de médecine physique et réadaptation fonctionnelle Meftah-Saadallah, Tunis, Tunisie;4. Service de médecine physique et réadaptation fonctionnelle de l?institut national d?orthopédie « Mohamed KASSAB », Ksar-Said, Tunis, Tunisie;1. Sport and Health Sciences, University of Exeter, Exeter, UK;2. Institute of Naval Medicine, Alverstoke, Gosport, PO12, UK;1. Gold Coast Centre for Orthopedic Research, Engineering and Education, Menzies Health Institute Queensland and School of Allied Health Sciences, Griffith University, Gold Coast, Australia;2. Department of Civil and Environmental Engineering, Imperial College London, United Kingdom;3. Queensland Children’s Motion Analysis Service, Queensland Pediatric Rehabilitation Service, Children’s Health Queensland Hospital and Health Service, Brisbane, Australia;4. Department of Orthopedics, Children’s Health Queensland Hospital and Health Service, Brisbane, Australia;5. Department of Medical Imaging and Nuclear Medicine, Children’s Health Queensland, Lady Cilento Children’s Hospital, Brisbane, Australia;6. Department of Industrial Engineering, Università degli Studi di Bologna, Italy;7. School of Information and Communication Technology, Griffith University, Nathan, Australia;1. Land Division, Defence Science and Technology Group, Australia;2. Deakin University, Geelong, Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Australia |
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| Abstract: | Soldiers routinely conduct load carriage and physical training to meet occupational requirements. These tasks are physically arduous and are believed to be the primary cause of musculoskeletal injury. Physical training can help mitigate injury risk when specifically designed to address injury mechanisms and meet task demands. This study aimed to assess lower-limb biomechanics and neuromuscular adaptations during load carriage walking in response to a 10-week evidence-based physical training program. Thirteen male civilian participants donned 23 kg and completed 5 km of load carriage treadmill walking, at 5.5 km h?1 before and after a 10-week physical training program. Three-dimensional motion capture and force plate data were acquired in over-ground walking trials before and after treadmill walking. These data were inputs to a musculoskeletal model which estimated lower-limb joint kinematics and kinetics (i.e., moments and powers) using inverse kinematics and dynamics, respectively. A two-way analysis of variance revealed significant main effect of training for kinematic and kinetics parameters at the knee and ankle joints (p < 0.05). Post-Hoc comparisons demonstrated a significant decrease (4.2%) in total negative knee power between pre- and post-March 5 km measures after training (p < 0.05). Positive power contribution shifted distally after training, increasing at the post-march measure from 39.9% to 43.6% at the ankle joint (p < 0.05). These findings demonstrate that a periodised training program may reduce injury risk through favourable ankle and knee joint adaptations. |
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| Keywords: | Load carriage Biomechanics Walking Joint mechanics Performance |
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