Energy-saving walking mechanisms in obese adults

Journal of Applied Physiology
Aitor Fernández MenéndezDavide Malatesta

Abstract

Energy-saving mechanisms are used in human walking. In obese adults the energy cost of walking (Cw) is higher compared with normal-body mass adults. However, the biomechanical factors involved in this extra cost should result in a higher Cw. The aim of this study was to compare energy-saving walking mechanisms [i.e., mechanical energy saved via pendulum (Recovery) and maximum possible elastic energy usage (MPEEu)] and their influence on Cw in obese vs. lean individuals. The net Cw (NetCw), external work (Wext), Recovery, MPEEu, and gait weight transfer duration (gWT) were computed for 13 lean [L; body mass index (BMI) 21.9 ± 1.5 kg/m2] and 13 obese (O; BMI 33.8 ± 2.5 kg/m2) individuals during treadmill walking at five speeds (0.56, 0.83, 1.11, 1.39, 1.67 m/s). No significant difference was found between groups in relative (per kg of body mass) NetCw (P = 0.13). Relative positive Wext was significantly lower at the three fastest speeds (P ≤ 0.003) whereas Recovery was higher at the two fastest speeds (P ≤ 0.01) in O than in L individuals. MPEEu tended to be lower in O than in L (P = 0.06), with significantly lower values in O compared with L at 1.39 and 1.67 m/s (P ≤ 0.017). gWT was significantly shorter in O than in L individua...Continue Reading

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Citations

May 23, 2020·Experimental Physiology·Henrique Bianchi OliveiraLeonardo Alexandre Peyré-Tartaruga
Jun 26, 2020·Journal of Applied Physiology·Aitor Fernández MenéndezDavide Malatesta
Jul 2, 2021·Experimental Physiology·Leonardo A Peyré-TartarugaPaola Zamparo

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Software Mentioned

MPEEu
SPSS

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