What Causes Weakness In Legs, Knees And Ankles After Masturbation?

hay doctor i am bilal 30 years old male . my problem is after doing the masturbation . i feel too much weakness in my legs knees and ankle . I am also patient of gerd from last five years . now i am 90% fine . pls help me doctor why this thing creating problem for me . i am awaiting for your reply .thanks