https://scholars.lib.ntu.edu.tw/handle/123456789/464448
標題: | Effects of gait speed on the body's center of mass motion relative to the center of pressure during over-ground walking | 作者: | Lu, H.-L. Kuo, M.-Y. Chang, C.-F. Lu, T.-W. Hong, S.-W. TUNG-WU LU |
關鍵字: | Balance control; COM-COP inclination; Gait speed; Preferred walking speed | 公開日期: | 2017 | 卷: | 54 | 起(迄)頁: | 354-362 | 來源出版物: | Human Movement Science | 摘要: | Preferred walking speed (PWS) reflects the integrated performance of the relevant physiological sub-systems, including energy expenditure. It remains unclear whether the PWS during over-ground walking is chosen to optimize one's balance control because studies on the effects of speed on the body's balance control have been limited. The current study aimed to bridge the gap by quantifying the effects of the walking speed on the body's center of mass (COM) motion relative to the center of pressure (COP) in terms of the changes and directness of the COM-COP inclination angle (IA) and its rate of change (RCIA). Data of the COM and COP were measured from fifteen young healthy males at three walking speeds including PWS using a motion capture system. The values of IAs and RCIAs at key gait events and their average values over gait phases were compared between speeds using one-way repeated measures ANOVA. With increasing walking speed, most of the IA and RCIA related variables were significantly increased (p?0.05) but not for those of the frontal IA. Significant quadratic trends (p?0.05) with highest directness at PWS were found in IA during single-limb support, and in RCIA during single-limb and double-limb support. The results suggest that walking at PWS corresponded to the COM-COP control maximizing the directness of the RCIAs over the gait cycle, a compromise between the effects of walking speed and the speed of weight transfer. The data of IA and RCIA at PWS may be used in future assessment of balance control ability in people with different levels of balance impairments. ? 2017 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/464448 | DOI: | 10.1016/j.humov.2017.06.004 | SDG/關鍵字: | adult; Article; balance impairment; body center of mass; body weight; Cadence; center of pressure; clinical article; human; human experiment; inclination angle; length; limb; male; motion; musculoskeletal system parameters; normal human; over ground walking; rate of change; standing; walking; walking speed; young adult; analysis of variance; biomechanics; body equilibrium; energy metabolism; gait; physiology; pressure; rotation; walking speed; Analysis of Variance; Biomechanical Phenomena; Body Weight; Energy Metabolism; Extremities; Gait; Humans; Male; Postural Balance; Pressure; Rotation; Walking Speed; Young Adult |
顯示於: | 醫學工程學研究所 |
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