Drag Sprints...

Hmm. The problem is they now stick soldiers, etc, in packs in big ol' trucks and lug 'em round that way. They'd be much fitter if they had to cycle everywhere (i.e. free fitness training!) and the world would be a better place.
Just imagine how many stealth missions could be done by bike...

Your soldiers might be but the running in the Australian army is crazy. Digger fitness levels are extremely high. Cycling can be done in leisure time. My brother bought a bike but rarely used it often being too knackered from 'work'.