Speeding up, not slowing down, decreases the metabolic energy needed to stabilize walking in the sagittal plane
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Stabilizing walking requires more active control in the frontal than in the sagittal plane. Nevertheless, we demonstrated that there is a considerable energetic cost associated with stabilizing walking in the sagittal plane, especially at slower speeds. This cost is higher in individuals who adjusted their average walking pattern more when walking was perturbed. Diseases that affect both walking speed and control might therefore have a disproportionately large effect on the metabolic cost of walking.
