Pendular energy transduction within the step during human walking on slopes at different speeds

PloS One
Arthur H DewolfPatrick A Willems

Abstract

When ascending (descending) a slope, positive (negative) work must be performed to overcome changes in gravitational potential energy at the center of body mass (COM). This modifies the pendulum-like behavior of walking. The aim of this study is to analyze how energy exchange and mechanical work done vary within a step across slopes and speeds. Ten subjects walked on an instrumented treadmill at different slopes (from -9° to 9°), and speeds (between 0.56 and 2.22 m s-1). From the ground reaction forces, we evaluated energy of the COM, recovery (i.e. the potential-kinetic energy transduction) and pendular energy savings (i.e. the theoretical reduction in work due to this recovered energy) throughout the step. When walking uphill as compared to level, pendular energy savings increase during the first part of stance (when the COM is lifted) and decreases during the second part. Conversely in downhill walking, pendular energy savings decrease during the first part of stance and increase during the second part (when the COM is lowered). In uphill and downhill walking, the main phase of external work occurs around double support. Uphill, the positive work phase is extended during the beginning of single support to raise the body. Dow...Continue Reading

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Citations

Apr 27, 2018·Journal of Applied Physiology·A H DewolfP A Willems
Nov 9, 2019·European Journal of Applied Physiology·A H DewolfP A Willems
Jun 12, 2020·European Journal of Applied Physiology·Arthur H DewolfPatrick A Willems
Jan 9, 2019·Frontiers in Physiology·Leonardo Alexandre Peyré-Tartaruga, Marcelo Coertjens
Feb 26, 2019·Frontiers in Physiology·Carly J SombricGelsy Torres-Oviedo
Jun 5, 2020·Journal of Neuroengineering and Rehabilitation·Carly J Sombric, Gelsy Torres-Oviedo
Oct 17, 2019·Frontiers in Neurology·Luigi Tesio, Viviana Rota
Jan 1, 2020·Journal of Physiological Anthropology·Daijiro AbeMasahiro Horiuchi
Mar 6, 2021·Sports Biomechanics·M Núñez LisboaA H Dewolf
Jul 2, 2021·Experimental Physiology·Leonardo A Peyré-TartarugaPaola Zamparo

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