Call it the time-strapped person's guide to fitness: All these activities provide a big calorie-burn payoff in record time.
Step 1: Jump rope Get a jump rope and start skipping. Or get your friends together for an old-fashioned double Dutch contest.
TIP: Calories burned are approximations based on a 150-pound person. If you weigh less, you'll burn a little less. Weigh more? You'll burn more!
Step 2: Take the stairs Hop on a stair climber. Better still, just walk up and down a staircase; it gives you the same workout, and requires no equipment.
Step 3: Row your boat Find a rowing machine, or take a friend for a brisk ride in a rowboat.
Step 4: Swim Do laps in the pool. The key is to swim at a continuous pace – no pina colada breaks!
Step 5: Punch it out Get into the ring and spar with a partner. Besides providing a good cardiovascular and resistance workout, boxing's a great stress reliever.
Step 6: Shoot some hoops Join a pick-up basketball game. Just make sure you're not benched in less than 10 minutes!
Step 7: Get out in the snow Strap on some snowshoes or go cross-country skiing. It may not be as exciting as downhill skiing, but it requires greater exertion. And, in this case, burning calories is what it's all about!
FACT: Three separate 10-minute workouts offer similar fitness benefits as one continuous 30-minute session, according to research.