Biomechanic and Energetic Effects of a Quasi-Passive Artificial Gastrocnemius on Transtibial Amputee Gait

Table 6

Affected-side knee positive work in late stance flexion with the AG compared between the two walking conditions with the quasi-passive artificial gastrocnemius: the Baseline condition, where the artificial gastrocnemius acted as a free-joint at the knee, and the Active condition, where the AG was appropriately engaged as per the controller. The values were averaged over the late stance knee flexion phase of the gait cycle.

	Baseline; total power; (Nms/kg)	Active; total power; (Nms/kg)	Active biological power; (Nms/kg)	Total % change from Baseline	Biological % change from Baseline
Subject 1	0.006 0.004	0.005 0.003	0.002 0.002	−6	−60
Subject 2	0.084 0.064	0.062 0.031	0.049 0.030	−26	−41