I think you should quit pt and let your knee rest. The swelling will go down and then your ROM will increase. You can bend well if it's swollen. If you're doing pt, it's going to swell. It's a no-win situation. Read the articles that have been left for you. Less exercise is more ROM. Try it for just a month. You will see a huge improvement. There are numerous threads that have had the same experience. Some of us even do no formal pt. I am one of them and I'm doing great! I let my live rehab my knee and ride my recumbent bike and do extension stretches. That's all! The only time I have a lot of swelling is after I've been on my feet too long or sat without elevating for a few hours. My daily living is meshes in with elevating and icing. Try it!
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. Don't give up! and if you find out let me know too lol.. I have a new OS for this surgery who i will see in 2 weeks if he tells me anything helpful i will pass it on