Pain in the knee can be caused by a number of things. It can be mild, limiting the ability to run or play sports, but more severe cases may prevent a person from performing any activity. Patellar tendon pain is usually worse on rising from a deep squat. It may also be aggravated by resisted quadriceps contraction when the knee is bent. A physical therapist can help a person determine if this pain is caused by a problem with the patellar tendon.
