PMID- 679946 OWN - NLM STAT- MEDLINE DCOM- 19781018 LR - 20190827 IS - 0301-5548 (Print) IS - 0301-5548 (Linking) VI - 39 IP - 1 DP - 1978 Jul 17 TI - Fat and carbohydrate metabolism during low intensity exercise: effects of the availability of muscle glycogen. PG - 7-16 AB - Four subjects were studied during exercise at 50% of maximum oxygen uptake after a normal diet, after a low carbohydrate (CHO) diet following exercise-induced glycogen depletion, and after a high CHO diet. This regime has previously been shown to cause changes in the amount of glycogen stored in the exercising muscles. Metabolic and respiratory parameters were measured during the exercise. The respiratory exchange ratio, blood lactate, blood pyruvate, blood glucose and plasma triglycerides were lower than normal following the low CHO diet and higher than normal following the high CHO diet. Plasma free fatty acids and plasma glycerol were higher than normal after the low CHO diet and lower than normal after the high CHO diet. The contribution of CHO to metabolism was less than normal after the low CHO diet and greater than normal after the high CHO diet. The altered availability of FFA does not appear to be a result of the variations in the blood lactate content. FAU - Maughan, R J AU - Maughan RJ FAU - Williams, C AU - Williams C FAU - Campbell, D M AU - Campbell DM FAU - Hepburn, D AU - Hepburn D LA - eng PT - Journal Article PL - Germany TA - Eur J Appl Physiol Occup Physiol JT - European journal of applied physiology and occupational physiology JID - 0410266 RN - 0 (Blood Glucose) RN - 0 (Dietary Carbohydrates) RN - 0 (Fatty Acids, Nonesterified) RN - 0 (Lactates) RN - 0 (Pyruvates) RN - 0 (Triglycerides) RN - 9005-79-2 (Glycogen) SB - IM MH - Adult MH - Blood Glucose MH - *Dietary Carbohydrates MH - Fatty Acids, Nonesterified/blood MH - Glycogen/*metabolism MH - Humans MH - Lactates/blood MH - *Lipid Metabolism MH - Male MH - Oxygen Consumption MH - *Physical Exertion MH - Pyruvates/blood MH - Triglycerides/blood EDAT- 1978/07/17 00:00 MHDA- 1978/07/17 00:01 CRDT- 1978/07/17 00:00 PHST- 1978/07/17 00:00 [pubmed] PHST- 1978/07/17 00:01 [medline] PHST- 1978/07/17 00:00 [entrez] AID - 10.1007/BF00429674 [doi] PST - ppublish SO - Eur J Appl Physiol Occup Physiol. 1978 Jul 17;39(1):7-16. doi: 10.1007/BF00429674.