Experimental study on the role of the ankle push off in the walk-to-run transition by means of a powered ankle-foot-exoskeleton.
The goal of this study was to analyse the role of the plantarflexor muscles in the walk-to-run transition (WRT) by means of a powered ankle-foot-exoskeleton. 11 female subjects performed several WRT's on an accelerating treadmill while their plantarflexors were assisted or resisted during push off. The WRT speed was lower in the resist condition than in the control condition which reinforces hypotheses from previous simulations, descriptive and experimental studies. There was no increase in WRT speed in the assist condition which is in contrast to another study where the plantarflexor push off was assisted indirectly by a horizontal traction at waist level. The lack of effect from the assist condition in the present study is possibly due to the narrowly focused nature of the experimental manipulation.
Malcolm
P
P
Department of Movement and Sports Sciences, Ghent University, Ghent, Belgium. Philippe.Malcolm@ugent.be
Fiers
P
P
Segers
V
V
Van Caekenberghe
I
I
Lenoir
M
M
De Clercq
D
D
D000054:Acceleration; D000843:Ankle Joint / Q000502:physiology*; D004576:Electromyography; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology; D016014:Linear Models; D008124:Locomotion / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D009989:Orthotic Devices; D012420:Running / Q000502:physiology*; D016138:Walking / Q000502:physiology*; D055815:Young Adult