PMID- 9189306
OWN - NLM
STAT- MEDLINE
DCOM- 19970807
LR  - 20191102
IS  - 1066-7814 (Print)
IS  - 1066-7814 (Linking)
VI  - 22
IP  - 3
DP  - 1997 Jun
TI  - Preexercise sugar feeding does not alter prolonged exercise muscle glycogen or 
      protein catabolism.
PG  - 268-79
AB  - The purpose of this study was to determine the effects of type of preexercise 
      sugar feedings (glucose [GLU] or fructose [FRU]) on muscle glycogen and protein 
      catabolism during prolonged exercise in fed men. Seven men cycled to exhaustion 
      on three different occasions at 70% VO2max, 45 min after ingestion (700 ml) of 
      either a 0.476 mol.L.1 carbohydrate (CHO) solution or a sweetened placebo (PLA). 
      With GLU, serum insulin was significantly increased prior to exercise. As a 
      result, serum glucose was significantly lower at 15 and 30 min of exercise with 
      GLU, but was similar to the other treatments thereafter. Time to fatigue was 
      absolutely longer with the GLU feeding, and exercise muscle glycogen catabolism 
      was absolutely lower during the FRU trial, but the observed differences did not 
      attain statistical significance due to intersubject variability. Protein 
      catabolism was similar for all treatments. These data indicate that a 60-g 
      preexercise glucose or fructose feeding following CHO loading procedures has 
      minimal effects on muscle glycogen or protein catabolism during prolonged 
      exercise.
FAU - van Zant, R S
AU  - van Zant RS
AD  - Department of Biological Sciences, Northern Arizona University, Flagstaff 
      86011-5640, USA.
FAU - Lemon, P W
AU  - Lemon PW
LA  - eng
PT  - Clinical Trial
PT  - Controlled Clinical Trial
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Can J Appl Physiol
JT  - Canadian journal of applied physiology = Revue canadienne de physiologie 
      appliquee
JID - 9306274
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Sucrose)
RN  - 0 (Insulin)
RN  - 0 (Muscle Proteins)
RN  - 30237-26-4 (Fructose)
RN  - 9005-79-2 (Glycogen)
RN  - IY9XDZ35W2 (Glucose)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Adult
MH  - Biopsy, Needle
MH  - Blood Glucose/metabolism
MH  - Chromatography, Gas
MH  - Dietary Sucrose/*administration & dosage
MH  - Double-Blind Method
MH  - Exercise/*physiology
MH  - Exercise Test
MH  - Exercise Tolerance/physiology
MH  - Fructose/administration & dosage
MH  - Glucose/administration & dosage
MH  - Glycogen/*metabolism
MH  - Humans
MH  - Insulin/blood
MH  - Male
MH  - Muscle Fatigue
MH  - Muscle Proteins/*metabolism
MH  - Muscle, Skeletal/*metabolism
MH  - Nitrogen/metabolism
EDAT- 1997/06/01 00:00
MHDA- 1997/06/01 00:01
CRDT- 1997/06/01 00:00
PHST- 1997/06/01 00:00 [pubmed]
PHST- 1997/06/01 00:01 [medline]
PHST- 1997/06/01 00:00 [entrez]
AID - 10.1139/h97-018 [doi]
PST - ppublish
SO  - Can J Appl Physiol. 1997 Jun;22(3):268-79. doi: 10.1139/h97-018.