Heart rate during aerobics classes in women with different previous experience of aerobics. - Laukkanen,R.M.; Kalaja,M.K.; Kalaja,S.P.; Holmala,E.B.; Paavolainen,L.M.; Tummavuori,M.; Virtanen,P.; Rusko,H.K. (Eur J Appl Physiol, 2001)