Shvartz, E Relationship between endurance and orthostatic tolerance. [electronic resource] - The Journal of sports medicine and physical fitness Jun 1968 - 75-80 p. digital Publication Type: Journal Article ISSN: 0022-4707 Subjects--Topical Terms: AdolescentAdultHeart--physiologyHumansMalePhysical ExertionPhysical FitnessPostureSyncope