Do these in a fast, controlled manner for cardio and ab work at the same time! This move also works your arms and shoulders.
- Come into a plank position with your arms and legs straight. Your hands should be underneath your shoulders and your feet hips-width distance apart. Draw your navel toward your spine to engage your core and to avoid straining your lower back.
- Keeping your torso parallel to the floor, lower your right forearm to the mat and then the left, coming into elbow plank. Then step your right hand back onto the mat, and then the left, pushing yourself back up to plank position. Try to avoid swaying the torso from side to side.
- Repeat for a total of 10 reps and then reverse the direction for another 10 reps. Check out this video to see how it's done.