Journal of Applied Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 67: 1843-1849, 1989;
8750-7587/89 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mitchell, J. B.
Right arrow Articles by Pearson, D. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mitchell, J. B.
Right arrow Articles by Pearson, D. R.

Journal of Applied Physiology, Vol 67, Issue 5 1843-1849, Copyright © 1989 by American Physiological Society

ARTICLES

Influence of carbohydrate dosage on exercise performance and glycogen metabolism

J. B. Mitchell, D. L. Costill, J. A. Houmard, W. J. Fink, D. D. Pascoe and D. R. Pearson
Human Performance Laboratory, Ball State University, Muncie, Indiana 47306.

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)


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
K. De Bock, W. Derave, M. Ramaekers, E. A. Richter, and P. Hespel
Fiber type-specific muscle glycogen sparing due to carbohydrate intake before and during exercise
J Appl Physiol, January 1, 2007; 102(1): 183 - 188.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
J. L. Andrews, D. A. Sedlock, M. G. Flynn, J. W. Navalta, and H. Ji
Carbohydrate loading and supplementation in endurance-trained women runners
J Appl Physiol, August 1, 2003; 95(2): 584 - 590.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. A. Febbraio, A. Chiu, D. J. Angus, M. J. Arkinstall, and J. A. Hawley
Effects of carbohydrate ingestion before and during exercise on glucose kinetics and performance
J Appl Physiol, December 1, 2000; 89(6): 2220 - 2226.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
R. G. Fritzsche, T. W. Switzer, B. J. Hodgkinson, S.-H. Lee, J. C. Martin, and E. F. Coyle
Water and carbohydrate ingestion during prolonged exercise increase maximal neuromuscular power
J Appl Physiol, February 1, 2000; 88(2): 730 - 737.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online