Ive been struggling with bilateral patellar tendinopathy/PFPS for years now. It’s gotten better with training and managing training load and volume. I’m able to train through it, it just feels like hell the rest of the time. I’ve read about isometrics having a positive effect on these issues, but haven’t been able to find details on it. How would one go about incorporating this into a training regimen. Isometric leg extensions post workout, wall sits on days off, etc?

Any advice or insight would be appreciated.