If you were told that you were going to be dropped into a hostile environment with a minimum of resources and that your survival would more than likely be predicated by your fitness level - what would you do? Would you run, do Pilates or Zumba, Kickboxing, Curves? Would any of those alone give you the physical tools you'll need to survive or even thrive?
Well, when Felix Baumgartner was preparing for his parachute jump from the stratosphere what do you think he used to prepare himself for the rigors of the jump and re-entry? You peeked didn't you?