PMID- 1618190
OWN - NLM
STAT- MEDLINE
DCOM- 19920806
LR  - 20190827
IS  - 0301-5548 (Print)
IS  - 0301-5548 (Linking)
VI  - 64
IP  - 6
DP  - 1992
TI  - Exogenous carbohydrate oxidation from maltose and glucose ingested during 
      prolonged exercise.
PG  - 523-7
AB  - Intestinal perfusion studies have shown that glucose absorption from maltose 
      occurs faster than from isocaloric glucose. To determine whether ingested maltose 
      might be a superior source of carbohydrate (CHO) for endurance athletes, we 
      compared the rates of gastric emptying, absorption and oxidation of 15 g.100 ml-1 
      solutions of maltose and glucose. Six endurance-trained cyclists drank 1200 ml of 
      either U-14C maltose or U-14C glucose as a 400-ml loading bolus immediately 
      before exercise, and as 8 x 100-ml drinks at 10-min intervals during a 90-min 
      ride at 70% of maximal oxygen consumption. The rates of gastric emptying [maltose 
      690 (SD 119) ml.90 min-1; glucose 655 (SD 93) ml.90 min-1], the appearance of 
      U-14C label in the plasma, and the peak rates of exogenous CHO oxidation [maltose 
      1.0 (SD 0.09) g.min-1; glucose 0.9 (SD 0.09) g.min-1] were not significantly 
      different. Further, the 51 (SD 8) g of maltose and the 49 (SD 9) g of glucose 
      oxidised during exercise were similar. Each accounted for approximately 20% of 
      the total CHO oxidised during the 90 min of exercise. Since only half of the CHO 
      delivered to the intestine was oxidised in the 90-min ride (maltose 49%; glucose 
      50%), we conclude that neither the rate of gastric emptying, nor digestion 
      limited the rate of ingested CHO utilisation during the early stages of 
      exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Hawley, J A
AU  - Hawley JA
AD  - Department of Physiology, University of Cape Town Medical School, South Africa.
FAU - Dennis, S C
AU  - Dennis SC
FAU - Nowitz, A
AU  - Nowitz A
FAU - Brouns, F
AU  - Brouns F
FAU - Noakes, T D
AU  - Noakes TD
LA  - eng
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  - 69-79-4 (Maltose)
RN  - IY9XDZ35W2 (Glucose)
SB  - IM
MH  - Adult
MH  - *Carbohydrate Metabolism
MH  - Exercise/*physiology
MH  - Gastric Emptying/physiology
MH  - Glucose/*metabolism
MH  - Humans
MH  - Intestinal Absorption/physiology
MH  - Kinetics
MH  - Male
MH  - Maltose/*metabolism
MH  - Oxidation-Reduction
MH  - Physical Endurance/physiology
EDAT- 1992/01/01 00:00
MHDA- 1992/01/01 00:01
CRDT- 1992/01/01 00:00
PHST- 1992/01/01 00:00 [pubmed]
PHST- 1992/01/01 00:01 [medline]
PHST- 1992/01/01 00:00 [entrez]
AID - 10.1007/BF00843762 [doi]
PST - ppublish
SO  - Eur J Appl Physiol Occup Physiol. 1992;64(6):523-7. doi: 10.1007/BF00843762.