RT Journal Article SR Electronic T1 Response to ‘Run for your life … at a comfortable speed and not too far’ JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 588 OP 588 DO 10.1136/heartjnl-2012-303556 VO 99 IS 8 A1 Thomas Weber YR 2013 UL http://heart.bmj.com/content/99/8/588.1.abstract AB