i like the gingerbread man one
the rest are pretty dumb to be honest
"mileage" means miles per gallon to most americans
my sport is your sport's punishment is a classic, but it should remain just that---a classic.
another classic would be something like: "shut up and run" or "quit crying and finish the set" or "it's only another 6 miles"
maybe something like "ten miles a day makes the pain go away"