The same amount of force F is not available. If they're putting athletes into this thing, the bigger the athlete, the more force (okay, the more power) is avai

The same amount of force F is not available. If they're putting athletes into this thing, the bigger the athlete, the more force (okay, the more power) is available for propulsion. They have bigger muscles which store more glycogen and have greater total mitochondrial activity, because there are simply more of these cells available to do the work.