Hello and thanks for the query
First of all I want to tell you that excess of every thing is dangerous. As you are doing excess masturbation
and your body does not allow it that's why you are facing the problem.
Exercise is very good for the body but it only help if you do it in a limit excess of exercise will cause fatigue
and your body can't do any thing else.
My advise is to reduce you work to once a day and than thrice a week.
This will surely helps you.