The Effect of Patellar Taping and Isometric Strength Training on Quadriceps Strength with Patellofemoral Pain Syndrome.

Inclusion Criteria: * knee pain for at least eight weeks that was aggravated by activities such as descending and ascending stairs, squatting, and running. * knee pain with a positive J sign (lateral tilt of patella) * more symptomatic and mal align knee included in case of bilateral involvement and a sign of patellar malalignment on the radiograph. Exclusion Criteria: * History of knee fracture * Patella dislocation * knee deformity (e.g., genu varum) * Knee Flexion contracture * Ligament/meniscal injuries, * NSAID or intra-articular injection, or knee Osteo arthritis.