PMID- 8330614 OWN - NLM STAT- MEDLINE DCOM- 19930813 LR - 20190830 IS - 0301-5548 (Print) IS - 0301-5548 (Linking) VI - 66 IP - 5 DP - 1993 TI - The effects of a high carbohydrate diet on postprandial energy expenditure during exercise in rats. PG - 445-50 AB - Whether or not a high intake of carbohydrate increases postprandial energy expenditure during exercise was studied in rats. The rats were meal-fed regularly twice a day (0800-0900 hours and 1800-1900 hours) on either a high carbohydrate (CHO) (carbohydrate/fat/protein = 70/5/25, % of energy) or high fat (FAT) (35/40/25) diet for 12 days. On the final day of the experiment, all of the rats in each dietary group were fed an evening meal containing equal amounts of energy (420 kJ.kg-1 body mass). After the meal, they were divided into three subgroups: pre-exercise control (PC), exercise (EX), and resting control (RC). The PC-CHO and PC-FAT groups were sacrificed at 2030 hours. The EX-CHO and EX-FAT groups were given a period of 3-h swimming, and then sacrificed at 2330 hours. The RC-CHO and RC-FAT groups rested after the meal and were sacrificed at 2330 hours. Total energy expenditure during the period 1.5 h from the commencement of exercise was higher in EX-CHO than in EX-FAT. The respiratory exchange ratio was also higher in EX-CHO than in EX-FAT, suggesting enhanced carbohydrate oxidation in the former. Compared with both PC-FAT and RC-FAT, the liver glycogen content of EX-FAT rats was significantly decreased by exercise. On the other hand, the liver glycogen content of both EX-CHO and RC-CHO was higher than that of PC-CHO rats. The glycogen content of soleus muscle of EX-FAT was slightly decreased during exercise, however, that of EX-CHO increased significantly.(ABSTRACT TRUNCATED AT 250 WORDS) FAU - Saitoh, S AU - Saitoh S AD - Laboratory of Biochemistry of Exercise and Nutrition, University of Tsukuba, Ibaraki, Japan. FAU - Matsuo, T AU - Matsuo T FAU - Suzuki, M AU - Suzuki M LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Appl Physiol Occup Physiol JT - European journal of applied physiology and occupational physiology JID - 0410266 RN - 0 (Dietary Carbohydrates) RN - 0 (Dietary Fats) RN - 0 (Liver Glycogen) RN - 9005-79-2 (Glycogen) RN - X4W3ENH1CV (Norepinephrine) RN - YKH834O4BH (Epinephrine) SB - IM MH - Animals MH - Body Weight/physiology MH - Diet MH - Dietary Carbohydrates/*pharmacology MH - Dietary Fats/pharmacology MH - Eating MH - Energy Metabolism/*drug effects MH - Epinephrine/urine MH - Glycogen/metabolism MH - Liver Glycogen/metabolism MH - Male MH - Muscles/drug effects/metabolism MH - Norepinephrine/urine MH - Organ Size/physiology MH - Oxygen Consumption/drug effects MH - Physical Exertion/*physiology MH - Pulmonary Gas Exchange/physiology MH - Rats MH - Rats, Sprague-Dawley EDAT- 1993/01/01 00:00 MHDA- 1993/01/01 00:01 CRDT- 1993/01/01 00:00 PHST- 1993/01/01 00:00 [pubmed] PHST- 1993/01/01 00:01 [medline] PHST- 1993/01/01 00:00 [entrez] AID - 10.1007/BF00599619 [doi] PST - ppublish SO - Eur J Appl Physiol Occup Physiol. 1993;66(5):445-50. doi: 10.1007/BF00599619.