The training-induced changes on automatism, conduction and myocardial refractoriness are not mediated by parasympathetic postganglionic neurons activity. - Zarzoso, M.; Such-Miquel, L.; Parra, G.; Brines-Ferrando, L.; Such, L.; Chorro, F.; Guerrero, J.; Guill, A.; O'Connor, J.; Alberola, A. (European Journal of Applied Physiology, 2012)