patellar tendon rupture. knee injury. sports injury. knee pain. front view. labeld medically

patellar tendon rupture knee injury quadriceps tendonitis pain swelling instability mobility surgery tear rehabilitation trauma flexion extension ligament repair mri diagnosis jumping athletes impact accident weakness recovery stiffness physical therapy immobilization bracing support muscles tendonopathy inflammation torn healing strengthening chronic acute exercise shock sports stretching balance function flexibility overuse rupture injury pain front view labeld medically severe tears impairing leg requiring