Feel fortunate the gym I go to has a stairmaster. You can bust butt on it if you are in the mood or do an easy cruise. Either way I get a good hill stimulation leg workout.
Box step-ups will do the same and perhaps are even harder, in that the box doesn't move. Box jumps are in another realm of fitness. One young Buck at the gym used to hit 5 feet and made it look easy. Then he went to college and got fat on beer!!!!
