Int J Sports Med 1994; 15(4): 186-191
DOI: 10.1055/s-2007-1021045
© Georg Thieme Verlag Stuttgart · New York

Effect of Exercise on Gastroduodenal Functions in Untrained Dogs

T. Kondo1 , S. Naruse2 , T. Hayakawa3 , T. Shibata3
  • 1Research Centre of Health, Physical Fitness and Sports, Nagoya University, Nagoya, 464-01, Japan
  • 2National Institute for Physiological Sciences, Okazaki, 444, Japan
  • 3Second Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, 466, Japan
Further Information

Publication History

Publication Date:
14 March 2008 (online)


Eight dogs were used to study the effect of 2h submaximal (60-70% of maximal heart rate) exercise on gastric secretion and gastroduodenal motor function in fasted and fed states. Fasting gastric acid and pepsin secretion were not affected by exercise. Postprandial gastric acid secretion was significantly depressed (p<0.05) during the second hour of exercise. Postprandial pepsin secretion was significantly decreased in both resting and exercised states. Gastric emptying of a liquid meal (protein 23.5%, fat 3.5%, carbohydrate 66.5% [w/w], 390 kcal) was significantly delayed by exercise (p<0.05). The migrating motor complex (MMC) was not observed during exercise, however, upon cessation of exercise, MMCs appeared at an expected 214±14 min after the pre-exercise MMC. Exercise did not affect the mean motor activity of the stomach but significantly increased the mean frequency (p<0.05) and amplitude (p<0.01) of the contractions in the duodenum, in the fasted and fed states, respectively. In conclusion, exercise lasting more than 1 h significantly depressed postprandial gastric secretion and significantly delayed gastric emptying (p<0.05). Duodenal motor activity was significantly increased (p<0.05 and p<0.01) by exercise in both the fasted and fed states.