RT Journal Article SR Electronic T1 "The Effect of Short Term Intensive Training on the Size and the Function of the Heart in Young and Old Men" JF Bulletin - British Association of Sport and Medicine JO Bull Br Assoc Sport Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 4 OP 4 DO 10.1136/bjsm.2.1.4 VO 2 IS 1 A1 K. Lange Andersen A1 Arne M. Benestad YR 1965 UL http://bjsm.bmj.com/content/2/1/4.abstract AB