Gait mechanics in subjects with unilateral chronic venous insufficiency was compared to healthy controls. Chronic venous insufficiency individuals recorded significantly lower joint moments and powers at ankle, knee and hip with non-significant differences in joint angles at the ankle and hip. This indicated inefficient energy transfer from ground reaction forces through the lower limb joints. Within the unilateral chronic venous insufficiency group, the leg without venous insufficiency recorded significantly lower joint moments and powers than the leg with venous insufficiency. These findings highlighted the risk of the contralateral leg developing venous insufficiency.