Take 15

Boost your metabolism with this quick 15-minute workout. Its designed to boost your metabolism and demolish fat. From the owner of turbulencetraining.com, Craig Ballantyne, C.S.C.S., M. Sc., created a three exercise workout that is great for people who have little time at the gym. You can also do this right from home if you have dumbbells and a pull-up bar.

You will complete the exercises in this order shown and repeat as many times as you can in 15 minutes with a 1 minute rest between each sequence. So completing all three exercises one time is one sequence.

1. Dumbbell split squat.



With both dumbbells on each side of the body, bring either foot forward as far as you can reach. Keeping your back straight and your hips aligned, squat until your thigh is parallel to the floor. Raise yourself back up in this position and complete 8 reps total. Repeat on the next leg.

2. Mountain climbers.



Coming into the pushup position, keep your abs pulled in and tight. Bring your left knee as close as you can to your left shoulder and repeat on the other side. It should feel as if you're climbing up a wall except your hands stay put. After you have brought your left leg to left shoulder, thats one rep. Complete 10 reps alternating, left to right.

3. Chin-ups.



Grab the bar with an under-hand grip, hands shoulder-width apart. Keeping your back flat and legs straight, pull yourself up so that your chin is even with the bar. Lower yourself and complete 10 reps or as many as you can.

Alternate version: If you're not at a place where you can complete chin-ups with your body weight, use an assisted pullup machine and match the weight to where you can complete 10 reps. If there is no pullup machine, use the lat machine and complete 10 reps. Keeping your back flat, wide grip, pull the bar to your chest and pause. Slowly release the bar above your head until your arms are almost straight and repeat.