Is it normal to have a joint pain and general exhaustion within the first 24 hours after masturbation? I am a 26years old male.

Could be. There is nothing wrong w masturbation. It will not make you fat, blind or infertile. Orgasm is an intense experience. Besides involving contraction of body muscles (which can leave you sore if not used much) there is release of neurotransmitters, some which make you very relaxed & even sleepy. If very tired for more than several hours, check w your doc to make sure something else isn't going on.