RecruitingPhase 3Device studyComparing the Outcome of Electrical Stimulation and Physical Therapy in Patellofemoral Pain SyndromeThe purpose of study is to evaluate the efficacy of the electrical muscle stimulation (EMS) device in patients with patellofemoral pain known as anterior knee pain. Usual treatment for it is physical therapy (PT). We want to evaluate and see if adding the electrical muscle stimulation will fasten the recovery and improved outcome in patellofemoral pain syndrome. Half of participants will receive EMS and PT while other half will receive PT only.