Heinz J Rgen F.
The best advice I can give for this is build some muscle, when you have a decent level of muscle it will act as a restriction on how far. As you're probably aware, large bodybuilders have very little felxibility for that reason.
Bertram C.
Actually the answer is your body. 1st time just try to do it as a game. And go forward as much as your body allows even if it's just a little
