Hi, I read your query and can understand the dilemma that you are facing. First of all, masturbation in normal and doesn t lead to any physical or mental weakness. Once a person becomes sexually mature, its physiological that either he has sex, or masturbate or he has nightfalls (wet dreams). So, you need to stop worrying from that point of view. Now, regarding your weakness, it might be possible that you may have some other problem that is causing it. Anxiety itself can lead to weakness. Many medical disorders can lead to it. I would suggest that if your problem regarding weakness is persisting, seek a psychiatric consultation. You might need to undergo some baseline investigations like complete blood count, blood sugar, etc. and proper treatment for any cause need to be instituted. Best wishes.