Figure 6
From: Adding Stiffness to the Foot Modulates Soleus Force-Velocity Behaviour during Human Walking
Experimental protocol.
Each subject walked on an instrumented treadmill at 1.25 m/s under 5 conditions in a randomized order: barefoot, shod and shod with three levels of added insole thickness. Data collection was separated in two testing sessions separated by approximately 24 hours: one day for metabolic energy analysis and another day for lower limb mechanics including ultrasound and electromyography. The order of the days was randomized. Rate of whole-body metabolic energy expenditure was analysed using indirect calorimetry. B-mode ultrasound images were acquired from the right soleus muscle, while electromyography sensors were placed on the ankle muscles of the left limb including lateral and medial gastrocnemius, soleus and tibialis anterior.
