Abstract
In this work, the effect of walking speed on the energy expenditure in traumatic lower-limb amputees was studied. The oxygen consumption was measured in 10 transfemoral amputees, 9 transtibial amputees and 13 control subjects, while they stood and walked at different speeds from 0.3 m s−1 to near their maximum sustainable speed. Standing energy expenditure rate was the same in lower-limb amputees and in control subjects (≈1.85 W kg−1). On the contrary, during walking, the net energy expenditure rate was 30–60% greater in transfemoral amputees and 0–15% greater in transtibial amputees than in control subjects. The maximal sustainable speed was about 1.2 m s−1 in transfemoral amputees and 1.6 m s−1 in transtibial amputees, whereas it was above 2 m s−1 in control subjects. Among these three groups, the cost of transport versus speed presented a U-shaped curve; the minimum cost increased with the level of amputation, and the speed at which this minimum occurred decreased.
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The authors want to thank Mr. N. Lopez for his skillful help during the experimentation in Cambodia. This study was supported by the Fonds National de la Recherche Scientifique of Belgium, the Fonds Spéciaux de Recherche of UCL.
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Genin, J.J., Bastien, G.J., Franck, B. et al. Effect of speed on the energy cost of walking in unilateral traumatic lower limb amputees. Eur J Appl Physiol 103, 655–663 (2008). https://doi.org/10.1007/s00421-008-0764-0
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DOI: https://doi.org/10.1007/s00421-008-0764-0