Burn, Baby, Burn: The Metabolism-Boosting Superset Workout

Superset 4: Obliques and Deep Abs

Crisscross

Targets: Abs and obliques

Triple the toning for your obliques compared with a standard crunch.

• Lie faceup on floor with elbows bent out to sides at shoulder level, hands touching behind ears and knees bent, feet flat.
• Crunch up, lifting feet off floor, and rotate torso toward right as you bring right knee into chest; simultaneously extend left leg diagonally up at a 45 degree angle.
• Keeping torso and legs lifted, switch sides and repeat to complete 1 rep.
• Do 10 to 12 reps, then move on to the Roll-Up.