Abstract
A study performed with healthy males differing in motor activity (athletes and nonathletes) revealed that, in subjects adapted to physical loads, fluid gastric secretion and the gastrointestinal motor and emptying functions were stable and did not change considerably under the influence of physical exercise. The orocecal transit time of a test breakfast depended on the level and the character of individual everyday motor activity. When a physical load was combined with a carbohydrate breakfast, parameters of gastrointestinal motility and emptying changed in parallel with blood levels of insulin, the somatotropic and adrenocorticotropic hormones, triiodothyronine, and cyclic guanosine monophosphate.
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