Gastric emptying in marathon runners.

Abstract

SUMMARY Radionuclide gastric emptying studies using 99m-Tc human serum albumin egg omelette have been carried out in 10 long distance runners at rest and during a 90 minute run at sustained speed. Resting values are compared with controls comprising 10 sedentary subjects. Runners show a significantly accelerated basal gastric emptying (runners tl/2=67-7 (5 9) min; sedentaries tl/2=85 3 (4'5) min, p<O0OOl). The exercise had no significant effect on gastric emptying in these trained subjects (exercise t/2=66 8 (5 9) min, p=NS), suggesting adaptation to exercise.Gastric emptying studies using radiolabelled meals are a well established method to assess gastric motility and its disorders'. Comparatively little has been done to evaluate the effect of exercise on gastric motility, mainly because of the lack of a standard method for measuring gastric emptying during physical exercise. Early physiological studies showed that gastric secretion is inhibited during exercise;2 depending on the severity of the exercise and on the ingestion of fluid. Contradictory data, however, have been reported,3'4 regarding changes in gastric emptying rates of solids and liquids on exercise, depending on the methodology used.The purpose of this investigation is to evaluate the suitability of radioisotope gastric emptying studies during physical exercise. We have studied a selected group of trained athletes to establish their gastric emptying patterns, and have compared their values with those obtained from a sedentary group of subjects. Methods SUBJECTSAfter giving informed consent, studies were carried out at rest on 10 healthy, male volunteers, aged 27 (5) years with a body surface area (BSA) of 1-76 (0-14) m2, and on 10 male long distance runners, aged 29 (6) years with a BSA of 1-74 (0-11) m2 (p=NS), first at rest, and later during exercise.The group of runners had a mean marathon

Gastric Myoelectrical Activity Increases after Moderate-Intensity Exercise with no Meals under Suppressed Vagal Nerve Activity

“…For the present study, we used a small amount of solid meal to stimulate the vagal nerve activity and examine its involvement, since a meal with high-energy content would suppress vagal nerve activity [21]. The small solid meal might further be supported by knowledge that gastric motility is more responsive in subjects that underwent exercise training rather than in sedentary subjects [22]. As a result, although activities of the cardiac vagal nerve and gastric motility were both enhanced after the ingestion of a meal, the exercise with a meal condition resulted in decreased HF component and increased gastric myoelectrical activity, which was also the result under the exercise with no meal condition.…”

Influence of the menstrual cycle and of menopause on the gastric emptying rate of solids in female volunteers

“…Gastric emptying rates of solids were measured with an isotopic method described previously [11,12]. In summary, after an 8-h fast, each subject ingested a test meal consisting of a sandwich with a one-egg omelette (white bread 50 g; egg 50 g; olive oil 5 g) and 200 ml of orange juice.…”

Acute Exercise and Gastric Emptying: A Meta-Analysis and Implications for Appetite Control

“…Ten studies utilised cycling as the mode of exercise [29, 42, 45, 49, 58-60, 65, 66, 68], two utilised running [47,69], five utilised walking [62-64, 70, 71] and the remaining studies compared modes of exercise (one running/walking [43] and two running/cycling [61,67]). …”