1. 1985 "Predicting running speed from a simple questionnaire";Campbell, M.J.;Br. J. Sports Med
2. Increased physical activity: a protective factor against heart attacks in Puerto Rico;Garcia-Palmieri, M.R.; Costas, R.; Cruz-Vidal, M.; Surlie, P.D.; Havilk, R.J.;Am. J. Cardiol,1982
3. 1985 'Epidemiological assessment of the role of physical activity and fitness in the development of cardiovascular disease";Kannel, W.B.; Wilson, P.; Blair, S.N.;Am. Heart J
4. Resting heart rate in marathon runners;Khosla, T.; Campbell, H.;Br. Med. J,1982
5. Vigorous exercise in leisure-time and the incidence of coronary heart disease;Morris, J.N.; Chave, S.P.W.; Adam, C.; Sivey, C.; Epstein, L.; Sheehan, D.J.;Lancet,1973