Jumper's knee happens when someone puts too much strain on the patellar ligament. Runners, basketball players, volleyball players and soccer players are prime targets when it comes to getting patellar tendonitis; although it can strike anyone if enough strain is put on the ligament. If you suspect you may have patellar tendonitis, you can usually feel pain when you press on the tendon that directly covers the knee. You may also experience swelling and stiffness. Sufferers of this form of tendonitis will usually feel pain when bending at the knee. This usually occurs when the patient kneels down or jumps.You can find more info about provailen review on the internet.