Suggest Treatment For Severe Muscle Cramps

Hi

i have been having these cramps since my early teenage years. I dont know if its muscle or body cramps. My whole body cramps e.g when I have to run away from something, I have to start slowly because if I just run fast I will fall. If I form a punch and tighten it, I cant open it quickly and fast. It just freezes and opens very slolwly. Please help