What exercises to do if osgood schlatter disease?

Not really: Usually osgood schlatters is treated with a combination of rest, ice and nsaids. Since the problem is exercise and activity exacerbated, i don't really think specific exercise will prevent however if you are in better condition and exercise on a regular basis you might be less likely to have this problem.

Manage Pain, stretch: The most common treatments for osgood-schlatters include rest/ activity modification, ice, compression, anti-inflammatories, massage and therapeutic stretching that focuses on the muscles of the upper leg (hamstrings & quads). Individuals with osgood schlatter may partipate in activity to limits of pain tolerance without concern.