Answer

There are many possible reasons why your knee gets sore and swollen when you run. One possible cause is poor running mechanics. For example, poor shock absorption or inadequate leg strength may contribute to abnormal stresses on the knee. Given that running is a repetitive, high impact activity, it is important to have your running mechanics and muscle strength/endurance evaluated. A physical therapist can identify the issues that may be contributing to your symptoms and advise you on strategies to remedy the situation.