Core strength training : the complete step-by-step guide to a stronger body and better posture for men and women. - New York : DK, 2013 - 224 p. : col. ill. ; 24 cm. Includes index. ISBN: 9781465402202 (pbk.) 1465402209 LCCN: 2012289549 Subjects--Topical Terms: Physical fitness.Exercise.Muscle strength. LC Class. No.: RA781.65 / .C67 2013 Dewey Class. No.: 613.7