Age-differences in the free vertical moment during step descent

Clinical Biomechanics
John G BuckleyLouise Johnson

Abstract

This study utilises a rarely examined biomechanical parameter--the free vertical moment--to determine age-related differences in rotational kinetics of the body about the vertical-axis when stepping down from a stationary position. Ten older and 10 young adults completed step-downs from three heights. Free vertical moment impulse and peak during step-initiation double-support and the subsequent step-execution phase, and vertical-axis pelvis angular displacement and velocity at instant of landing were compared. The free vertical moment during double-support was directed away from the intended lead-limb side, producing a change in vertical-axis rotational momentum that moved the lead-limb in a forwards-medial direction about the stationary support/trailing limb during the subsequent step-execution phase. The free vertical moment during step-execution was directed towards the lead-limb side and acted to slow/halt the body's vertical-axis rotation away from lead-limb side. Free vertical moment impulse and peak during double-support were similar between groups (P>0.05), but during step-execution were significantly reduced in older adults (P=0.002). As a result older adults had greater vertical-axis pelvis angular displacement and ve...Continue Reading

References

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Citations

Aug 7, 2013·Gait & Posture·Bastien MoineauVincent Nougier
Jul 18, 2017·Journal of Applied Biomechanics·Emily E GerstleStephen C Cobb
Jun 13, 2018·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Hiroyuki SekiMasaya Nakamura
May 29, 2018·Journal of Biomechanics·Jérémie BegueGeorges Dalleau
Sep 4, 2019·Experimental Gerontology·Jérémie BegueTeddy Caderby
Apr 20, 2021·Sports Biomechanics·Ji-Hyun KoKarl M Newell

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