Knee pain in trainer but not on the road
Hi guys. I need help.
I got a bike fit when I bought my bike 3 years ago. On the road, everything is perfect (long rides, shorter faster rides, etc). Last winter I got a trainer and subscribed to zwift. I loved it, BUT I started feeling knee pain (mainly on the back) to the point I got tendinitis. When the spring came and the road riding season started, I rode perfectly.. no knee pain or anything. I attributed the issue to pretty hard riding on Zwift and moved on.
Now again back to Zwift and Im getting the same symptoms. Even with easy rides.
I dont understand why there is a difference, especially since I ride much more outside. The bike fit was done with the bike on a trainer...
Thoughts?