Spatiotemporal and kinematic changes in gait while carrying an energy harvesting assault pack system |
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| Affiliation: | 1. Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA;2. U.S. Army Research Laboratory, Aberdeen Proving Ground, MD, USA;3. Communications-Electronics, Research, Development, and Engineering Center, Aberdeen Proving Ground, MD, USA;1. School of Engineering, Comillas Pontifical University, Alberto Aguilera 23, 28015 Madrid, Spain;2. School of Engineering, Universidad de Castilla-la Mancha, Avenida Camilo José Cela, S/N Campus Universitario, 13005 Ciudad Real, Spain;3. Department of Electrical Engineering, Tampere University of Technology, Korkeakoulunkatu 10, FI-33720 Tampere, Finland;1. Division for Electricity, Uppsala University, Box 534, 751 21 Uppsala, Sweden;2. Institut PPRIME-CNRS, ENSMA, Université de Poitiers, BP 40109, F-86961 Futuroscope Chasseneuil CEDEX, France;1. Laboratoire des Signaux et Systémes, Supélec – 3 rue Joliot Curie, Plateau de Moulon, 91192 Gif-sur-Yvette, France;2. LGEP – CNRS/SUPELEC, 11 rue Joliot Curie, Plateau de Moulon, 91192 Gif sur Yvette, France;3. Departamento de Ingeniería Eléctrica, Universidad Técnica Federico Santa María, Avda. Vicuña Mackema 3939, San Joaquín, Santiago, Chile;1. Graduate Student, Orthopaedic Research Laboratory, Departments of Biomedical Engineering and Orthopaedic Surgery, Virginia Commonwealth University, Richmond, VA;2. Professor, Department of Radiology, Virginia Commonwealth University, Richmond, VA;3. Professor and Chair, Department of Orthopaedic Surgery, Virginia Commonwealth University, Richmond, VA;4. Professor, Department of Biomedical Engineering, and Director, Orthopaedic Research Laboratory, Virginia Commonwealth University, Richmond, VA;1. Department of Rehabilitation Medicine, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, The Netherlands;2. Department of Biomechanical Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands;3. Faculty of Technology, Innovation & Society, The Hague University of Applied Sciences, Johanna Westerdijkplein 75, 2521 EN The Hague, The Netherlands;4. Department of Rehabilitation Medicine, VU Medical Center, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands;1. Agency for Defense Development, 34186, P.O.Box 35, Yuseong, Daejeon, Republic of Korea;2. Faculty of Applied Science and Engineering, Memorial University of Newfoundland, St. John''s, NL, A1B 3X5, Canada |
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| Abstract: | Soldiers are fielded with a variety of equipment including battery powered electronic devices. An energy harvesting assault pack (EHAP) was developed to provide a power source to recharge batteries and reduce the quantity and load of extra batteries carried into the field. Little is known about the biomechanical implications of carrying a suspended-load energy harvesting system compared to the military standard assault pack (AP). Therefore, the goal of this study was to determine the impact of pack type and load magnitude on spatiotemporal and kinematic parameters while walking at 1.34 m/s on an instrumented treadmill at decline, level, and incline grades. There was greater forward trunk lean while carrying the EHAP and the heavy load (decline: p < 0.001; level: p = 0.009; incline: p = 0.003). As load increased from light to heavy, double support stance time was longer (decline: p = 0.012; level: p < 0.001; incline: p < 0.001), strides were shorter (incline: p = 0.013), and knee flexion angle at heel strike was greater (decline: p = 0.033; level: p = 0.035; incline: p = 0.005). When carrying the EHAP, strides (decline: p = 0.007) and double support stance time (incline: p = 0.006) was longer, the knee was more flexed at heel strike (level: p = 0.014; incline: p < 0.001) and there was a smaller change in knee flexion during weight acceptance (decline: p = 0.0013; level: p = 0.007; incline: p = 0.0014). Carrying the EHAP elicits changes to gait biomechanics compared to carrying the standard AP. Understanding how load-suspension systems influence loaded gait biomechanics are warranted before transitioning these systems into military or recreational environments. |
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| Keywords: | Load carriage Walking biomechanics Energy harvesting Military Backpack |
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