15 Workouts That Will Help You Burn Fat and Build Muscle — It's Time to Work

If you want to boost your metabolism, you've got to pick up the weights. This 45-minute strength workout is a triple threat and will leave you feeling stronger once you're done.

This 45-minute workout consists of only compound exercises that help you burn more fat and calories and build muscle.

Mix up your routine with this 20-minute rowing workout.

Spice up your treadmill workouts with this 30-minute pyramid intervals workout.

This CrossFit workout only takes 20 minutes to do, and you're really going to feel it in your legs afterward.

If you're new to strength training, this four-week workout plan is a great place to start.

Ignite your upper body with this six-move dumbbell workout.

Work your legs, arms, and abs with this 20-minute total-body workout.

Out of workout ideas? Follow along with this 30-minute total-body workout.

Why stress about what you're going to do at the gym when you can follow this week-long fat-burning workout plan.

If you're short on time, give this 20-minute workout a go.

Do this 30-minute total-body workout when you're short on time. Warning: you're going to be insanely sore for days.

Work your arms, legs, and core with this basic but intense 15-minute dumbbell workout.