I was a part of the 100 boys and girls that were being screened into the Navy few years ago. We were made to go through rigorous exercises to make some of us quit. We had to run very long distances at high speeds and climb rocks too. Some people fainted in the process, and it was later disclosed that they had HEART CONDITIONS. I didn't make it into the Navy.

Not all exercises are okay for our hearts, especially if your heart can't cope with the rapid contraction and expansion.