However there certainly exists some direct relationship between diet selection and substrate oxidation during exercise since glucose oxidation before and during exercise was larger in rats with the smallest lipid intake. Therefore, the relationship between diet selection, substrate oxidation and exercise training is certainly complex. A more precise assessment of protein metabolism may be important to better understand this point. Perprandial changes in gastric wall tension control ingestion in pigs. L Lepionka, L Lepionka, CH Malbert (Station de recherches porcines, Inra, ôJJ9U Saint-(iilles, France).). Short term control of ingestion remains hypothetical because meal induced fundic relaxation cancels the possible gastric distension. Similarly, experimentally induced wall tension changes modify the sensation of a gastric distension. The aim of this study is to evaluate the characteristics of the ingestive pattern during proximal gastric distensions. Perprandial isobaric or isovolumic fundic distensions were performed in four awake pigs by using an electronic barostat. Distension values were: 200/7, 250/11, 400/16 6 and 450/21 (mL/mmHg). Ingestive pattern for 500 g meal was characterized by duration of the meal, food intake rate FIR and no

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