Effects of exercise on gastric volume and pH in the proximal portion of the stomach of horses
Brief content of the article:
The objective of the authors was to assess effects of exercise on a treadmill with changes in gastric volume and pH in the proximal portion of the stomach of (3) horses. A polyester bag of aproximately 1,600 ml was placed in the proximal portion of the stomach and changes in bag volume were recorded before, during and after a training session on a treadmill with and without prior withholding of feed. In separate experiments, pH in the proximal portion of the stomach was continuously recorded during exercise for fed and and feed-withheld conditions. Changes in intra-abdominal and intragastric pressure were simultaneously recorded during a training session.The authors concluded that an increased intra-abdominal pressure during intense exercise in horses causes gastric compression, pushing acidic contents into the proximal , squamous-lined region of the stomach. Increased duration of acid exposure directly related to daily duration of exercise may be the reason that squamous lesions tend to develop or worsen when horses are in intensive training programs.
Keywords: gastric ulcers; squamous mucosa; pH; intragastric pressure; intra-abdominal pressure.
Lorenzo-Figueras, M., and Meritt, A.M. 2002. Effects of exercise on gastric volume and pH in the proximal portion of the stomach of horses. American Journal of Veterinary Research 63: 1481-1487)
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