EFFECT OF CARBOHYDRATE INGESTION ON GLUCOSE KINETICS DURING EXERCISE

被引:104
作者
MCCONELL, G
FABRIS, S
PROIETTO, J
HARGREAVES, M
机构
[1] UNIV MELBOURNE,ROYAL MELBOURNE HOSP,DEPT PHYSIOL,PARKVILLE,VIC 3052,AUSTRALIA
[2] UNIV MELBOURNE,ROYAL MELBOURNE HOSP,DEPT MED,PARKVILLE,VIC 3052,AUSTRALIA
关键词
INSULIN; CATECHOLAMINES; GLUCOSE UPTAKE; HEPATIC GLUCOSE PRODUCTION; FREE FATTY ACIDS;
D O I
10.1152/jappl.1994.77.3.1537
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Six well-trained men (peak pulmonary oxygen uptake = 5.03 +/- 0.11 1/min) were studied during 2 h of exercise at 69 +/- 1% peak pulmonary oxygen uptake to examine the effect of carbohydrate (CHO) ingestion on glucose kinetics. Subjects ingested 250 ml of either a 10% glucose solution containing 6-[H-3]glucose (CHO) or a sweet placebo every 15 min during exercise. Glucose kinetics were assessed by 6,6-[H-2]glucose infusion corrected for gut-derived glucose in CHO. Plasma glucose was higher (P < 0.05) in CHO from 20 min. Total glucose appearance was higher in CHO due to glucose delivery from the gut (68 +/- 7 g), since hepatic glucose production was reduced by 51% (29 +/- 5 vs. 59 +/- 5 g). Glucose uptake was higher in CHO (96 +/- 7 vs. 60 +/- 6 g) with the ingested glucose supplying 67 +/- 4 g and, with the assumption that it was fully oxidized, accounted for 14 +/- 1% of total energy expenditure. In conclusion, CHO ingestion during prolonged exercise results in suppression of hepatic glucose production and increased glucose uptake. These effects appear to be mediated mainly by increased plasma glucose and insulin levels.
引用
收藏
页码:1537 / 1541
页数:5
相关论文
共 31 条
[1]   INFLUENCE OF GLUCOSE INGESTION ON FUEL-HORMONE RESPONSE DURING PROLONGED EXERCISE [J].
AHLBORG, G ;
FELIG, P .
JOURNAL OF APPLIED PHYSIOLOGY, 1976, 41 (05) :683-688
[2]   GLUCAGON LEVELS IN NORMAL AND DIABETIC SUBJECTS - USE OF A SPECIFIC IMMUNOABSORBENT FOR GLUCAGON RADIOIMMUNOASSAY [J].
ALFORD, FP ;
BLOOM, SR ;
NABARRO, JDN .
DIABETOLOGIA, 1977, 13 (01) :1-6
[3]   INFLUENCE OF CARBOHYDRATE INGESTION ON FUEL SUBSTRATE TURNOVER AND OXIDATION DURING PROLONGED EXERCISE [J].
BOSCH, AN ;
DENNIS, SC ;
NOAKES, TD .
JOURNAL OF APPLIED PHYSIOLOGY, 1994, 76 (06) :2364-2372
[4]  
Coggan A R, 1991, Int J Sport Nutr, V1, P279
[5]   PLASMA-GLUCOSE METABOLISM DURING EXERCISE IN HUMANS [J].
COGGAN, AR .
SPORTS MEDICINE, 1991, 11 (02) :102-124
[6]   CARBOHYDRATE-METABOLISM DURING INTENSE EXERCISE WHEN HYPERGLYCEMIC [J].
COYLE, EF ;
HAMILTON, MT ;
ALONSO, JG ;
MONTAIN, SJ ;
IVY, JL .
JOURNAL OF APPLIED PHYSIOLOGY, 1991, 70 (02) :834-840
[7]   MUSCLE GLYCOGEN UTILIZATION DURING PROLONGED STRENUOUS EXERCISE WHEN FED CARBOHYDRATE [J].
COYLE, EF ;
COGGAN, AR ;
HEMMERT, MK ;
IVY, JL .
JOURNAL OF APPLIED PHYSIOLOGY, 1986, 61 (01) :165-172
[8]   CARBOHYDRATE FEEDING DURING PROLONGED STRENUOUS EXERCISE CAN DELAY FATIGUE [J].
COYLE, EF ;
HAGBERG, JM ;
HURLEY, BF ;
MARTIN, WH ;
EHSANI, AA ;
HOLLOSZY, JO .
JOURNAL OF APPLIED PHYSIOLOGY, 1983, 55 (01) :230-235
[9]   SYNERGISTIC INTERACTION BETWEEN EXERCISE AND INSULIN ON PERIPHERAL GLUCOSE-UPTAKE [J].
DEFRONZO, RA ;
FERRANNINI, E ;
SATO, Y ;
FELIG, P .
JOURNAL OF CLINICAL INVESTIGATION, 1981, 68 (06) :1468-1474
[10]   ROLE OF INSULIN AND GLUCAGON IN THE REGULATION OF HEPATIC GLUCOSE PRODUCTION DURING EXERCISE [J].
FELIG, P ;
WAHREN, J .
DIABETES, 1979, 28 :71-75