Dear,
Welcome to HCM
We understand your concerns
I went through your details. You are doing good.
Masturbation twice a day is not at all harmful directly to your health. Masturbation cannot reduce your muscle growth directly. There are no direct health side effects of masturbation.
But there are some side effects indirectly. When you masturbate, energy is spend by your body. Naturally, after masturbation you feel tired. The more time you masturbate, the more you are tired. Physically and then mentally you will be tired. This is also mental
stress. Lack of knowledge about masturbation can also cause
anxiety and
depression. These are the indirect side effects of masturbation.
I suggest you to reduce the masturbation frequency to thrice or four times a week and engage in physical activities.
If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute detail possible.
Hope this answers your query. Further clarifications are welcome.
Good luck. Happy New Year. Take care.