Improved regeneration after 2 weeks of "sleep high, train low"? - Steinacker, J. M.; Dehnert, C.; Peterle, C.; Lormes, W.; Liu, Y.; Baur, S.; Hütler, M.; Böning, D.; Gabriel, H.; Gomez-Islinger, R.; Petersen, K. G.; Lehmann, M. (International Journal of Sports Medicine, 1998)