RT Journal Article SR Electronic T1 Black box warning: when exercise is not medicine 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 134 OP 136 DO 10.1136/bjsports-2022-106291 VO 57 IS 3 A1 Dusty Marie Narducci YR 2023 UL http://bjsm.bmj.com/content/57/3/134.abstract AB