The high cost of swing leg circumduction during human walking

Gait & Posture
K Alex ShorterArthur D Kuo

Abstract

Humans tend to walk economically, with preferred step width and length corresponding to an energetic optimum. In the case of step width, it is costlier to walk with either wider or narrower steps than normally preferred. Wider steps require more mechanical work to redirect the body's motion laterally with each step, but the cost for narrower steps remains unexplained. Here we show that narrow steps are costly because they require the swing leg to be circumducted around the stance leg. Healthy adults (N=8) were tested walking with varying levels of circumduction, induced through lightweight, physical obstructions ("Fins") attached medially to the lower legs, during treadmill walking at fixed speed (1.25ms(-1)) and step width. The net rate of metabolic energy expenditure increased approximately with the square of circumduction amplitude, by about 50% for an amplitude (measured at mid-swing) of about 18cm. Subjects also generated greater stance leg torque and more arm motion to counter the circumduction, among other compensatory motions that may contribute to energy expenditure. The costs of producing and countering lateral leg motion partially explains the poorer economy of some gait pathologies where circumduction may occur, for...Continue Reading

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Citations

Feb 1, 2020·Human Factors·Leia StirlingHyeg Joo Choi
Dec 12, 2019·Journal of Biomechanical Engineering·Derya KarabulutYunus Ziya Arslan
May 23, 2020·Physiological Measurement·Tomas BäcklundNina Sundström
Jun 26, 2020·Journal of Applied Physiology·Aitor Fernández MenéndezDavide Malatesta
Aug 28, 2020·Journal of Neuroengineering and Rehabilitation·Tunc AkbasJames Sulzer
Jan 24, 2018·The Journal of Experimental Biology·Jaehyun BaeConor J Walsh
Nov 4, 2017·Experimental Brain Research·K D StoneH C Dijkerman
Jun 8, 2018·Journal of the Royal Society, Interface·Sjoerd M Bruijn, Jaap H van Dieën
May 10, 2020·Scientific Reports·Michelle KikelNathan E Thompson
Feb 8, 2020·Journal of Neuroengineering and Rehabilitation·Sung Yul ShinJames Sulzer
Dec 19, 2020·Computer Methods in Biomechanics and Biomedical Engineering·Patrick McKeenLeia Stirling
Dec 7, 2018·Journal of Human Evolution·Nathan E ThompsonBrigitte Demes
Jun 11, 2021·Journal of Physical Activity & Health·Jingjing XuePing Hong

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