Rock Your Core and Tone Your Abs With This Bodyweight Workout

Twisting fires up the obliques, the abdominals that crisscross your core and wrap around your waist.

• Begin in an elbow plank with your feet slightly wider than your hips.
• Twist your entire torso to the left reaching your left arm to the ceiling. Your pelvis will rotate, too, but do keep it level, and don't let it rise to the ceiling or sink toward the floor.
• Return to and elbow plank, and repeat the twisting motion to the right to complete one rep.