Cortisol/cortisone ration: A predicative marker of overtraining? - Gouarne, C.; Groussard, C.; Delamarche, P.; Gratas-Delamarche, A.; Duclos, M. (Book of Abstracts - 9th Annual Congress European College of Sport Science, July 3-6, 2004, Clermont-Ferrand, France, 2004)