How do you workout with pateller femoral pain syndrome?

Protect kneecaps. Knee cap cartilage wear is the issue. Patella compression force is 8 times body weight w jumping, and 3xbw during squats/stairs.Avoid inclines, declines, squats, lunges, stairmaster, leg presses as all increase pressure and harm worn patella cartilage. Idealized weight decreases patella load. Keep knees straight during all quad exercises. Crosstrain. Hams curls, calves, hips are all ok.