"Running offers a full-body resistance workout, and few activities match its calorie expenditure," says Weiss. Send that burn rate even higher by adding these moves to your run: Start with five minutes at a comfortable even-grade jog, then do five minutes up a hill or 5 percent incline on the treadmill. For the last 10 minutes, return to a comfortable pace on a flat surface and work in 6-10 interval sprints lasting 10 seconds each. Intervals power your heart rate and metabolism, and that burns extra calories, says Weiss.
Total Time: 20 minutes
Estimated Calories Burned: 250