RT Journal Article SR Electronic T1 Stride frequency and ventilation at constant carbon dioxide output 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 3 OP 3 DO 10.1136/bjsm.20.1.3-a VO 20 IS 1 YR 1986 UL http://bjsm.bmj.com/content/20/1/3.2.abstract AB