PMID- 2600017
OWN - NLM
STAT- MEDLINE
DCOM- 19900208
LR  - 20171213
IS  - 8750-7587 (Print)
IS  - 0161-7567 (Linking)
VI  - 67
IP  - 5
DP  - 1989 Nov
TI  - Influence of carbohydrate dosage on exercise performance and glycogen metabolism.
PG  - 1843-9
AB  - This study was undertaken to examine the effects of ingestion of carbohydrate 
      (CHO) solutions of 0 (WP), 6 (CHO-6), 12 (CHO-12), and 18 g CHO/100 ml (CHO-18) 
      on performance and muscle glycogen use. Ten trained cyclists performed five 
      120-min cycling trials. The first 105 min of each trial was at 70% of maximal O2 
      consumption (VO2max), and the final 15 min was an all-out performance ride on an 
      isokinetic cycle ergometer equipped to measure total work output. In one of the 
      trials (CHO-12I) the submaximal portion of the ride consisted of seven 15-min 
      rides at 70% of VO2max with a 3-min rest between each ride. Every 15 min the men 
      consumed 8.5 ml.kg-1.h-1 (approximately 150 ml) of one of the four test 
      solutions. Venous blood samples were obtained every 15 min for glucose and 
      insulin. Muscle biopsies were obtained from the vastus lateralis at 0 and 105 min 
      in the WP and the CHO-12 continuous and intermittent trials. Biopsy samples were 
      assayed for glycogen and sectioned and stained for myosin adenosinetriphosphatase 
      and glycogen for single fiber depletion measurements. There were no differences 
      in glycogen use (86.7 +/- 6.0, 75.5 +/- 7.9, and 83.5 +/- 5.5 mmol/kg for the WP, 
      CHO-12C, and CHO-12I, respectively) or depletion patterns between the WP and the 
      two CHO-12 trials. Blood glucose was significantly elevated in both the CHO-12 
      trials and in the CHO-18 trial compared with the WP trial.(ABSTRACT TRUNCATED AT 
      250 WORDS)
FAU - Mitchell, J B
AU  - Mitchell JB
AD  - Human Performance Laboratory, Ball State University, Muncie, Indiana 47306.
FAU - Costill, D L
AU  - Costill DL
FAU - Houmard, J A
AU  - Houmard JA
FAU - Fink, W J
AU  - Fink WJ
FAU - Pascoe, D D
AU  - Pascoe DD
FAU - Pearson, D R
AU  - Pearson DR
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Appl Physiol (1985)
JT  - Journal of applied physiology (Bethesda, Md. : 1985)
JID - 8502536
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
RN  - 9005-79-2 (Glycogen)
SB  - IM
MH  - Adult
MH  - Analysis of Variance
MH  - Blood Glucose/metabolism
MH  - Dietary Carbohydrates/administration & dosage/*pharmacology
MH  - Eating
MH  - Exercise Test
MH  - Glycogen/*metabolism
MH  - Heart Rate
MH  - Humans
MH  - Male
MH  - Muscles/*metabolism
MH  - Oxygen Consumption/physiology
MH  - Physical Exertion/*physiology
MH  - Pulmonary Gas Exchange
MH  - Work Capacity Evaluation
OID - NASA: 90094105
EDAT- 1989/11/01 00:00
MHDA- 1989/11/01 00:01
CRDT- 1989/11/01 00:00
PHST- 1989/11/01 00:00 [pubmed]
PHST- 1989/11/01 00:01 [medline]
PHST- 1989/11/01 00:00 [entrez]
AID - 10.1152/jappl.1989.67.5.1843 [doi]
PST - ppublish
SO  - J Appl Physiol (1985). 1989 Nov;67(5):1843-9. doi: 10.1152/jappl.1989.67.5.1843.