Ever go to a workout class with the best of intentions, only to feel completely wiped after 15 minutes? We've been there — and it sucks. Endurance is the name of the game, and if you focus on improving yours, exercise will feel like less of a chore.
How to do this series: Perform one set of all five moves in a row with no breaks, and then rest for 30 seconds. Repeat that two more times, and you'll probably be more than a little winded. Do it daily for a week or two, though, and you'll be surprised by how easily you fly through the circuit. Oh, and by then? Your next workout class will be a breeze.