What are general exercise recommendations for young athletes with hcm?

Avoid strenuous . Hypertrophic cardiomyopathy (hcm) is potentially dangerous for athletes because the dynamic outflow obstruction intensifies as Adrenalin is released during exercise. This results in more forceful contraction which makes the obstruction worse. Chest pain, light headedness can occur due to the obstructive process. Arrhythmias including sudden cardiac death might also arise.
There aren't any. It will be difficult to find specific recommendations because the first manifestation of hcm can be sudden death. 30% of people with hcm have obstruction to blood flow at rest. 10% only with rigorous activity. Noncompetitive exercise is a reasonable recommendation I have seen. However, any exercise program should be under the direction of a physician.