Quick Cardio

Raise your heart and torch calories, no gym required.

Complete 10 reps each of both these moves, rest for 60 seconds, then repeat, minus 1 rep per move (first a circuit of 10, then 9, then 8, and so on) until you get to 5 reps.

1. Burpees
Strand with your feet hip-width apart, arms at your sides,. Squat, lean forward, and place your palms on the floor along the outsides of your feet. Kick your feet back and straighten your arms into a pushup position. Jump back into a squat, then stand. That's a 1 rep.

2. Shuttle Runs
Find some open space (empty parking lot, cruise-ship deck, sandy beach, friend's backyard). Set two markers-tank tops, water bottles, whatever you have with you-about 60 feet apart. Starting at one end, run or jog to the other end. That's 1 rep. Turn and run back; that's the second rep. Make it harder. Shorten the rest to 30 seconds between sets or continue the countdown until you get 1 rep of each.