I had patella tendonitis and this affected my sports activities. I had to stop tap dancing and tennis – too painful! Even walking became painful. The knee was very unreliable on stairs etc. as kept giving way.
I had physiotherapy and shock wave therapy but no improvement was noticed. The PRP injection was a success but was painful and the knee was sore for a day or so afterwards. I was able to go back to doing my activities and lots of walking. I would recommend the PRP treatment because it solved my problem and my knee has remained pain-free for 3 years.