HOW: Start on your back with a resistance band placed slightly above your knees. Bring one leg in towards your chest, with the leg on the floor drive in with your heels to lift your hips up towards the ceiling. At the end position your knee, hip, and shoulder should be in one straight line. Hold the end position and squeeze the glutes, then slowly return to starting position.
FEEL: You should feel your glutes work to control this motion. At no point should you feel your low back muscles doing the lifting motion. If you feel it only in your hamstrings, try bending your knees a bit more and repeat. With the leg that is elevated will feel the muscles in the front of the hip working.
COMPENSATION: Avoid arching at the low back as you perform this. Don't let the knee bend with the leg that is elevated.