PMID- 15946410
OWN - NLM
STAT- MEDLINE
DCOM- 20050808
LR  - 20190719
IS  - 0007-1145 (Print)
IS  - 0007-1145 (Linking)
VI  - 93
IP  - 4
DP  - 2005 Apr
TI  - High rates of exogenous carbohydrate oxidation from a mixture of glucose and 
      fructose ingested during prolonged cycling exercise.
PG  - 485-92
AB  - A recent study from our laboratory has shown that a mixture of glucose and 
      fructose ingested at a rate of 1.8 g/min leads to peak oxidation rates of 
      approximately 1.3 g/min and results in approximately 55% higher exogenous 
      carbohydrate (CHO) oxidation rates compared with the ingestion of an isocaloric 
      amount of glucose. The aim of the present study was to investigate whether a 
      mixture of glucose and fructose when ingested at a high rate (2.4 g/min) would 
      lead to even higher exogenous CHO oxidation rates (>1.3 g/min). Eight trained 
      male cyclists (VO2max: 68+/-1 ml/kg per min) cycled on three different occasions 
      for 150 min at 50% of maximal power output (60+/-1% VO2max) and consumed either 
      water (WAT) or a CHO solution providing 1.2 g/min glucose (GLU) or 1.2 g/min 
      glucose+1.2 g/min fructose (GLU+FRUC). Peak exogenous CHO oxidation rates were 
      higher (P<0.01) in the GLU+FRUC trial compared with the GLU trial (1.75 (SE 0.11) 
      and 1.06 (SE 0.05) g/min, respectively). Furthermore, exogenous CHO oxidation 
      rates during the last 90 min of exercise were approximately 50% higher (P<0.05) 
      in GLU+FRUC compared with GLU (1.49 (SE 0.08) and 0.99 (SE 0.06) g/min, 
      respectively). The results demonstrate that when a mixture of glucose and 
      fructose is ingested at high rates (2.4 g/min) during 150 min of cycling 
      exercise, exogenous CHO oxidation rates reach peak values of approximately 1.75 
      g/min.
FAU - Jentjens, Roy L P G
AU  - Jentjens RL
AD  - Human Performance Laboratory, School of Sport and Exercise Sciences, University 
      of Birmingham, Edgbaston B15 2TT, UK.
FAU - Jeukendrup, Asker E
AU  - Jeukendrup AE
LA  - eng
PT  - Clinical Trial
PT  - Comparative Study
PT  - Journal Article
PT  - Randomized Controlled Trial
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Br J Nutr
JT  - The British journal of nutrition
JID - 0372547
RN  - 0 (Dietary Carbohydrates)
RN  - 30237-26-4 (Fructose)
RN  - IY9XDZ35W2 (Glucose)
SB  - IM
MH  - Adult
MH  - Analysis of Variance
MH  - *Bicycling
MH  - Dietary Carbohydrates/*administration & dosage/*metabolism
MH  - Fructose/administration & dosage/metabolism
MH  - Glucose/administration & dosage/metabolism
MH  - Humans
MH  - Isotope Labeling
MH  - Male
MH  - Oxidation-Reduction
MH  - Oxygen Consumption
MH  - *Physical Endurance
EDAT- 2005/06/11 09:00
MHDA- 2005/08/09 09:00
CRDT- 2005/06/11 09:00
PHST- 2005/06/11 09:00 [pubmed]
PHST- 2005/08/09 09:00 [medline]
PHST- 2005/06/11 09:00 [entrez]
AID - S0007114505000619 [pii]
AID - 10.1079/bjn20041368 [doi]
PST - ppublish
SO  - Br J Nutr. 2005 Apr;93(4):485-92. doi: 10.1079/bjn20041368.