This exercise is a great way to target the lateral trunk muscles.

1. Lie down on one side and place the foam roller between your knees. If desired, you can place a small pillow or Pilates ball under your head. Place the arm on top in front of your chest for balance. Keep your hips and shoulders stacked vertically.

   

2. Exhale and lift both legs off of the mat without letting your pelvis tilt forward or backward. Inhale and lower your legs slowly back to the start position. Repeat 8-12 times, then switch sides.