RT Journal Article SR Electronic T1 Limiting our daily sitting/lying to just 23.5 hours: too ambitious? 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 79 OP 79 DO 10.1136/bjsm.2009.057349 VO 43 IS 2 A1 Karim Khan YR 2009 UL http://bjsm.bmj.com/content/43/2/79.abstract AB