The collaboration of agonists with antagonists of the lower limbs is an important mechanism for maintaining balance. Impaired Coordination of these muscles is one of the major causes of falls and serious injuries. Reduced strength of the knee joint flexors,which are responsible for protecting the joint from injury, leads to impaired interaction of agonists with antagonists [9,28,30]. Gard-ner and Montgomery showed that patients with PAD Exhibit 86% higher frequency of tripping and imbalance and 73% higher frequency of falls than people of similar age in the control group. This is probably due to progressive muscle sarcopenia of the lower limbs in patients with PAD