Gastric emptying during walking and running: effects of varied exercise intensity

  • P. D. Neufer
  • A. J. Young
  • M. N. Sawka


Gastric emptying is increased during running (50%–70% maximal aerobic uptake,\(\dot V_{{\text{O}}_{{\text{2max}}} } \) as compared to rest. Whether this increase varies as a function of mode (i. e. walking vs running) and intensity of treadmill exercise is unknown. To examine the gastric emptying characteristics of water during treadmill exercise performed over a wide range of intensities relative to resting conditions, 10 men ingested 400 ml of water prior to each of six 15 min exercise bouts or 15 min of seated rest. Three bouts of walking exercise (1.57 m · s−1) were performed at increasing grades eliciting ∼28%, 41% or 56% of\(\dot V_{{\text{O}}_{{\text{2max}}} } \). On a seperate day, three bouts of running (2.68 ms−1) exercise were performed at grades eliciting ∼57%, 65% or 75% of\(\dot V_{{\text{O}}_{{\text{2max}}} } \). Gastric emptying was increased during treadmill exercise at all intensities excluding 75%\(\dot V_{{\text{O}}_{{\text{2max}}} } \) as compared to rest. Gastric emptying was similar for all intensities during walking and at 57% and 65%\(\dot V_{{\text{O}}_{{\text{2max}}} } \) during running. However, running at 74%\(\dot V_{{\text{O}}_{{\text{2max}}} } \) decreased the volume of original drink emptied as compared to all lower exercise intensities. Stomach secretions were markedly less during running as compared to walking and rest. These data demonstrate that gastric emptying is similarly increased during both moderate intensity (∼8%–65%\(\dot V_{{\text{O}}_{{\text{2max}}} } \)) walking or running exercise as compared to resting conditions. However, gastric emptying decreases during high intensity exercise. Increases in gastric emptying during moderate intensity treadmill exercise may be related to increases in intragastric pressure brought about by contractile activity of the abdominal muscles.

Key words

Gartric emptying Exercise intensity Stomach secretions 


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  1. Adolf EF (1947) Physiology of man in the desert. Interscience, New YorkGoogle Scholar
  2. Brener W, Hendrix TR, McHugh PR (1983) Regulation of gastric emptying of glucose. Gastroenterology 85:76–80Google Scholar
  3. Costill DL, Saitin B (1974) Factors limiting gastric emptying during rest and exercise. J Appl Physiol 37:679–683Google Scholar
  4. Coyle EF, Costill DL, Fink WJ, Hoopes DG (1978) Gastric emptying rates of selected athletic drinks. Res Quart 49:119–124Google Scholar
  5. Feldman M, Nixon JV (1982) Effect of exercise on postprandial gastric secretion and emptying in humans. J Appl Physiol 53:851–854Google Scholar
  6. Fordtran JS, Saltin B (1967) Gastric emptying and intestinal absorption during prolonged severe exercise. J Appl Physiol 23:331–335Google Scholar
  7. Foster C, Costill DL, Fink WJ (1980) Gastric emptying characteristics of glucose and glucose polymers. Res Quart 51:299–305Google Scholar
  8. Konturek SJ (1980) Opiates and the gastrointestinal tract. Am J Gastroenterol 74:285–291Google Scholar
  9. Minami H, McCallum RW (1984) The physiology and pathophysiology of gastric emptying in humans. Gastroenterology 86:1592–1610Google Scholar
  10. Murray R (1987) The effects of consuming carbohydrate-electrolyte beverages on gastric emptying and fluid absorption during and following exercise. Sports Med 4:322–351Google Scholar
  11. Neufer PD, Costill DL, Fink WJ, Kirwan JP, Fielding RA, Flynn MG (1986) Effects of exercise and carbohydrate composition on gastric emptying. Med Sci Sports Exerc 18:658–662Google Scholar
  12. Pitts GC, Johnson RE, Consolazio FC (1944) Work in the heat as affected by intake of water, salt and glucose. Am J Physiol 142:253–259Google Scholar
  13. Rowell LB (1983) Cardiovascular adjustments to thermal stress. In: Shepherd JT, Abboud FM (eds) Handbook of Physiology. The Cardiovascular System, Peripheral Circulation and Organ Blood Flow. Am Physiol Soc, Bethesda, MD, pp 967–1023Google Scholar
  14. Sawka MN, Young AJ, Francesconi RP, Muza SR, Pandolf KB (1985) Thermoregulatory and blood responses during exercise at graded hypohydration levels. J Appl Physiol 59:1394–1401Google Scholar
  15. Schedl HR (1966) Use of polyethylene glycol and phenol red as unabsorbed indicators for intestinal absorption studies in man. Gut 7:159–163Google Scholar
  16. Seiple RS, Vivan VM, Fox EF, Bartels RL (1983) Gastricemptying characteristics of two glucose polymer-electrolyte solutions. Med Sci Sports Exerc 15:366–369Google Scholar
  17. Wheeler KB, Banwell JG (1986) Intestinal water and electrolyte flux of glucose-polymer electrolyte solutions. Med Sci Sports Exerc 18:436–439Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • P. D. Neufer
    • 1
  • A. J. Young
    • 1
  • M. N. Sawka
    • 1
  1. 1.US Army Research Institute of Environmental MedicineNatickUSA

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