Better yet, put on your hiking boots, your backpack with some weight in it, and your ipod and head to the nearest high school football field to do some laps on the stadium steps – up and down from one end to the other, over and over. If you have access to a high rise office building, you can use the stairway there when it gets hot out. The nice thing about this is your legs get training for up and down, whereas on a Stairmaster at the gym you only get the up part.
