PMID- 4033404
OWN - NLM
STAT- MEDLINE
DCOM- 19851024
LR  - 20190829
IS  - 0195-9131 (Print)
IS  - 0195-9131 (Linking)
VI  - 17
IP  - 4
DP  - 1985 Aug
TI  - Effect of carbohydrate feeding frequencies and dosage on muscle glycogen use 
      during exercise.
PG  - 472-6
AB  - Nine men were studied during three 4-h cycling bouts to determine the effect of 
      frequency and dosage of solid carbohydrate (CHO) feedings (86 g) on muscle 
      glycogen utilization and exercise performance. In the frequency trial (F), the 
      subjects ingested 10.75 g of CHO along with 200 ml of water at 30-min intervals; 
      in the dosage trial (D), the subjects ingested 21.5 g of CHO with 400 ml of water 
      at 60-min intervals. During the control trial (C), the subjects ingested 400 ml 
      of an artificially sweetened placebo at 60-min intervals. Respiratory exchange 
      ratios were significantly elevated in both trials D and F (P less than 0.05). 
      Blood glucose was significantly elevated in trial D 20 min post-feeding but had 
      returned to control levels by 50 min. In trial F, blood glucose was maintained at 
      a constant level throughout the entire 4 h. In trial C, blood glucose declined 
      steadily during the entire 4 h. Despite the differences in blood glucose levels 
      between the three trials, there were no significant differences in the rate of 
      muscle glycogen utilization in any of the trials (D = 82.9 +/- 6.6 [SE] mmol X 
      kg-1 vs C = 80.9 +/- 6.9 mmol X kg-1 vs F = 74.4 +/- 12.2 mmol X kg-1). In a 
      sprint ride (100% VO2max) to exhaustion at the end of each trial, the subjects 
      performed significantly longer in trial F compared to C (120.97 +/- 9.6 vs 81.0 
      +/- 7.1 s).(ABSTRACT TRUNCATED AT 250 WORDS)
FAU - Fielding, R A
AU  - Fielding RA
FAU - Costill, D L
AU  - Costill DL
FAU - Fink, W J
AU  - Fink WJ
FAU - King, D S
AU  - King DS
FAU - Hargreaves, M
AU  - Hargreaves M
FAU - Kovaleski, J E
AU  - Kovaleski JE
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Med Sci Sports Exerc
JT  - Medicine and science in sports and exercise
JID - 8005433
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Fatty Acids, Nonesterified)
RN  - 9005-79-2 (Glycogen)
RN  - PDC6A3C0OX (Glycerol)
SB  - IM
MH  - Adult
MH  - Blood Glucose/metabolism
MH  - Dietary Carbohydrates/administration & dosage/*pharmacology
MH  - Fatty Acids, Nonesterified/blood
MH  - Glycerol/blood
MH  - Glycogen/*metabolism
MH  - Heart Rate/drug effects
MH  - Homeostasis/drug effects
MH  - Humans
MH  - Male
MH  - Muscles/*metabolism
MH  - Oxygen Consumption/drug effects
MH  - *Physical Exertion
EDAT- 1985/08/01 00:00
MHDA- 1985/08/01 00:01
CRDT- 1985/08/01 00:00
PHST- 1985/08/01 00:00 [pubmed]
PHST- 1985/08/01 00:01 [medline]
PHST- 1985/08/01 00:00 [entrez]
AID - 10.1249/00005768-198508000-00012 [doi]
PST - ppublish
SO  - Med Sci Sports Exerc. 1985 Aug;17(4):472-6. doi: 
      10.1249/00005768-198508000-00012.