Bonaduce, D Intensive training and cardiac autonomic control in high level athletes. [electronic resource] - Medicine and science in sports and exercise May 1998 - 691-6 p. digital Publication Type: Journal Article ISSN: 0195-9131 Standard No.: 10.1097/00005768-199805000-00008 doi Subjects--Topical Terms: AdolescentAdultBicycling--physiologyCardiac OutputHeart RateHumansMaleOxygen Consumption--physiologyPhysical Endurance--physiologyPhysical Fitness--physiologyVagus Nerve--physiology