"...they don't improve your condition" And often they make it worse, much worse as in giving you a stoke after manipulating your neck. See http://www.scienceba

"...they don't improve your condition" And often they make it worse, much worse as in giving you a stoke after manipulating your neck. See http://www.sciencebasedmedicine.org/?p=94 http://www.sciencebasedmedicine.org/?p=94 for an interesting summary.