Photo: © 2009 Jupiterimages Corporation

According to research at the Harvard-affiliated Benson-Henry Institute for Mind Body Medicine, the repetitive motion and focus of needlework can elicit what's known as the relaxation response—a calming meditation-like state that slows heart rate and causes blood pressure to drop. In addition, a study published in the Journal of the American Geriatrics Society suggests that knitting is associated with a lower risk of dementia for those 65 and older.