The Side to Side Lunge is an exercise within the Pain-Free Movement Specialist sequencing as a B/C exercise. A B/C exercise will generally fall in the middle or toward the end of a Function First corrective exercise program. We use this exercise to help create some disassociation between the pelvis and spine as we load the hips independently. The nuances of this exercise make a big difference. Be sure to pay attention to all of the details to get the most out of this exercise.