Selective Neuromuscular Electrical Stimulation on VMO

Inclusion Criteria: * For Healthy group: * with no history of osteomyoarticular lesion or surgery in the lower limbs in the previous six months * non-corrected neurological, vestibular, visual and/or hearing impairment * For Patellofemoral pain syndrome group: * clinical diagnosis of patellofemoral pain syndrome * absence of other disorders in the knee * refer pain at leafs two of the following activities: when remain seated for a long period, squat, kneel and go up or down stairs. Exclusion Criteria: * Individuals experiencing pain during collection procedures * do not perform exercises as instructed by the researches