Is it advisable to do exercise when affected by Hereditary multiple exostoses? Which activities would you suggest and how intense should they be?

Repetition will be the greatest issue and thing to avoid. What might not hurt at all to do once or ten times will cause great pain and swelling to do a hundred times, and after that, any more times before the injury has healed will just injure more. The answer is not to avoid the activity but avoid the repetition. This flies in the face of most exercise fads and so creativity is needed.

I went out for tennis in high school but the swing was repetitive and I ended up in the hospital When we went tubing on the Gila River there was constant exercise to stay in the best place in the river, so the need changes constantly as did the vigor, but the river kept us cool, and at the end, we wanted to go again but the time taken was more than it seemed. It was only the next day that your muscles hurt all over because you constantly exercised every muscle, but mot in the joints as there was little repetition.