Runner's Knee(Patellofemoral Pain Syndrome)
Common symptoms include pain under and around the kneecap especially while running downhill, walking downstairs, and squatting or lunging. Severe cases may cause the feeling of grinding cartilage.
Improper footwear(Old shoes or not adequate cushioning in shoe)
Misalignment/Improper tracking of Patella
Weak/Tight Quadriceps and Hamstrings
Having the proper amount of support/cushioning in a running shoe
Quadricep/Hamstring strengthening and flexibility exercises
Avoid running downhill until symptoms subside