In brief Quadriceps contusions can frustrate athletes, because the time away from athletic activity is variable and unpredictable. The determining factor in returning the patient to play safely is whether the patient has regained 120° or more of knee flexion. Immobilization for the first 24 hours in 120° of knee flexion- which preserves the needed flexion and minimizes intramuscular bleeding and spasms- accomplishes this goal quickly. Muscle stimulation and stretching also help the athlete recover quickly.