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Titre : | Propulsive Forces Applied to the Bodys Center of Mass Affect Metabolic Energetics Poststroke (2019) |
Auteurs : | Kelly Penke ; Korre Scott ; Yunna Sinskey |
Type de document : | Article |
Dans : | Archives of Physical Medicine and Rehabilitation (Vol. 100, n° 6, 2019) |
Article en page(s) : | p. 1068-1075 |
Langues: | Anglais |
Descripteurs : |
HE Vinci Accident vasculaire cérébral (AVC) ; Démarche ; Rééducation et réadaptation |
Résumé : |
Objective
To investigate the effect of timing and magnitude of horizontally directed propulsive forces to the center of mass (COM) on the metabolic cost of walking (COW) for individuals poststroke. Design Repeated-measures, within-subject design. Setting Research laboratory. Participants A total of 9 individuals with chronic hemiparesis poststroke and 7 unimpaired similarly aged controls (N=16). Intervention Individuals walked on a treadmill in 2 separate studies. First, we compared the metabolic COW with an anterior force applied to the COM that (1) coincided with paretic propulsion or (2) was applied throughout the gait cycle. Next, we compared the metabolic COW with anterior (assistive) or posterior (resistive) forces applied during paretic propulsion. Main Outcome Measure Metabolic COW. Results The COW was significantly greater in the Stroke group. Anterior (propulsive) assistance reduced the COW differently based on group. The Stroke group exhibited a 12% reduction in COW when assistance was provided only during paretic propulsion, but not when assistance was provided throughout the gait cycle. In contrast, the Control group demonstrated reduced COW during both anterior assistance conditions. In addition, we observed that resistance during paretic propulsion (simulated hemiparesis for Control group) significantly increased the COW. Conclusions Systematically manipulating propulsive forces at the bodys COM had a profound influence on metabolic cost. The timing of propulsive forces to the COM is important and needs to coincide with paretic terminal stance. Additional internally or externally generated propulsive forces applied to the bodys COM poststroke may produce a lower metabolic COW. |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.sciencedirect.com/science/article/pii/S000399931831445X |