it is not due to masturbation
that you had gone weak ,but is due to your eating habits and life style ,if you are taking good diet and doing good work out you will never get any king of weakness.
you should do some tests of vitamins
and hormones which will give you exact diagnosis
it will help you in near future also and more over don t think that masturbation had spoiled you ,it is an natural process and one can do it ,but you can t be addicted to it
once you understand it you will get the treatment of it
Dr Vinod Raina