- Boot Camp
For a workout that’s going to keep your metabolism elevated, turn to boot camp, as these classes (think Barry’s Bootcamp) combine two of the most effective styles of training: interval and resistance. “You’ll perform exercises, some more cardio-focused and others strength-focused, full-out for short bursts of time, coupled with short periods of rest,” says Adam Rosante, certified personal trainer and author of The 30-Second Body. But if it’s your first time going to a boot camp class, speak up. He says a good instructor will help you determine when you need to crank up the weight or intensity (tip: if you can cruise through 10 reps without any trouble, it’s too easy), keep your form on par, and can always provide a modification for any move that might be too tough or irritates an injury. If you can’t make it to a studio, though, you can virtually sweat it out with Rosante in his 20-minute C9 Challenge, or try this bodyweight-only 16-minute routine.