Rock Your Core and Tone Your Abs With This Bodyweight Workout

The simple move, also know as quadruped, works your abs and back simultaneously making it one of the simplest core exercises around.

• Begin on all fours with your hands directly under your shoulders and your knees directly under your hips. Bring your abs to your spine as your bring your left knee and right elbow together under your torso.
• Keeping your torso stable, straighten your right arm and left leg. Reach through your left heel to engage the muscles on the back of the leg and your butt.
• This completes one rep. After completing 10 to 15 reps, switch sides.