HOW: Start in a standing position balancing on one leg with the other leg in the air behind you. Have a band anchored under your foot and around the top of your upper back. Hold onto the band in each hand - try to position the band similarly to how you would position a barbell in a back squat. Perform the exercise by letting your hip and knee bend to squat down, lower down as far as you can. Then stand tall and repeat.
FEEL: This should feel like a lower body workout, specifically your glutes and quadriceps muscles.
COMPENSATION: All of the same rules apply with your general single leg squat form, maintain good trunk control - do not lean too much side to side. Maintain a level pelvis, stay strong and aligned through your hip and knee. It is ok for your knee to go forward over your toes, but also let your hip bend and push your butt back, your trunk will learn forward and that is ok too.