RT Journal Article SR Electronic T1 Why hamstring eccentrics are hamstring essentials JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 463 OP 465 DO 10.1136/bjsports-2011-090962 VO 46 IS 7 A1 Kristian Thorborg YR 2012 UL http://bjsm.bmj.com/content/46/7/463.abstract AB