The Only Chiropractor Designed Back Roller - No other back roller can improve your posture or possibly help you live better with back pains than Acumobility Foam Roller! The only back cracker made by a chiropractor, this yoga wheel works well on all areas of the back - from the neck down to the lower back. With its patented bump pattern and a gap in the center, you won’t feel any pressure on your spine. A therapeutic and truly effective back cracker that can release knots and trigger points.