Come into a plank position with your feet resting on the edge of the bed.
Draw your navel toward your spine to engage your abs, which will help keep your spine straight and your body stabilized.
Lift your right leg into the air, then slowly lower it back toward the bed, but don't let it touch. This counts as one repetition. Keep your pelvis level throughout your reps.
Complete three sets of 10 to 15 reps with the right leg, and then repeat with the left.