RT Journal Article SR Electronic T1 No pain, no gain? Thoughts on the Caerphilly study 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 4 OP 5 DO 10.1136/bjsm.2003.010264 VO 38 IS 1 A1 I-M Lee YR 2004 UL http://bjsm.bmj.com/content/38/1/4.abstract AB