Inclusion Criteria:  - Level of weekly physical activity (recreational activity and regular non-competitive runners : at least 1 running session per week)  Exclusion Criteria:  History of pain or episodes of foot or ankle sprains during the past 6 months; Foot or leg fractures during the past year; Severe deformity of the foot or leg; Self-declared disability due to neuromuscular impairment of the lower limbs; Neurological or vestibular deficit that could hinder balance (diabetes mellitus, radiculopathie lumbosacral, soft tissue disorder such as Marfan or Ehlers-Danlos syndrome) ; Any absolute contraindication to neuromuscular electrical stimulation (NMES) (cardiac pacemaker, epileptic disorders, pregnancy defibrillator); Participation in an exercise program specifically designed to strengthen the ankle or foot during the last 6 months