Be careful me old boltarian, people might think your calling them fat
Still, i cant see how fitness would help with sliding in.If anything it just takes practice. Knowing your own body and judging the best way to land on it (with the bottle infront of you
) will help greatly. It will help with sliding in and will prevent injury.
Darren
PS: or you could just do what Sergei made Russian Legion do, 1000 supermans from one barricade to the next