It's day 1 and we're starting with the largest fat burning muscles in the body: the legs! Prepare to feel the burn in your inner thighs, quads, calves and hamstrings during this 4 move circuit!

Short and sweet, this burnout pays special attention to your glutes! Start building strength and definition for a round, toned booty with this 4 minute routine!

Time to work that upper body! Say good bye to wobbly arms and pesky back fat with this killer circuit!

Time to work those triceps! This targeted routine will help you tighten and tone those arms so you can go sleeveless with confidence!

Cardio doesn't have to be a long, drawn out affair! Today's workout proves that you can get the job with short, dynamic, intense movements. That's right, 12 minutes, 4 moves, killer workout!

Let's make those abs pop! These 4 moves will make your muscles scream but trust us, it is worth it!