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


     

J Appl Physiol 91: 1782-1790, 2001;
8750-7587/01 $5.00
This Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
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
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
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 Web of Science (12)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lacombe, V. A.
Right arrow Articles by Baskin, C. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Lacombe, V. A.
Right arrow Articles by Baskin, C. R.
Vol. 91, Issue 4, 1782-1790, October 2001

Muscle glycogen depletion and subsequent replenishment affect anaerobic capacity of horses

Veronique A. Lacombe, Kenneth W. Hinchcliff, Ray J. Geor, and Carole R. Baskin

Equine Exercise Physiology Laboratory, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210

The purpose of this study was to determine the effect of muscle glycogen depletion and subsequent replenishment on anaerobic capacity of horses. In a blinded crossover study, seven fit horses performed glycogen-depleting exercise on two occasions. Horses were infused after glycogen-depleting exercise with either 6 g/kg body wt of glucose as a 13.5% solution in 0.9% NaCl (Glu) or with 0.9% NaCl (Sal) of equivalent volume. Subsequently, horses performed a high-speed exercise test (120% of maximal rate of oxygen consumption) to estimate maximum accumulated oxygen deficit. Replenishment of muscle glycogen was greater (P < 0.05) in Glu [from 24.7 ± 7.2 (SE) to 116.5 ± 7 mmol/kg wet wt before and after infusion, respectively] than in Sal (from 23.4 ± 7.2 to 47.8 ± 5.7 mmol/kg wet wt before and after infusion, respectively). Run time to fatigue during the high-speed exercise test (97.3 ± 8.2 and 70.8 ± 8.3 s, P < 0.05), maximal accumulated oxygen deficit (105.7 ± 9.3 and 82.4 ± 10.3 ml O2 equivalent/kg, P < 0.05), and blood lactate concentration at the end of the high-speed exercise test (11.1 ± 1.4 and 9.2 ± 3.7 mmol/l, P < 0.05) were greater for Glu than for Sal, respectively. We concluded that decreased availability of skeletal muscle glycogen stores diminishes anaerobic power generation and capacity for high-intensity exercise in horses.

maximal accumulated oxygen deficit; oxygen consumption; lactate; glucose


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
A. P. Waller, G. J. F. Heigenhauser, R. J. Geor, L. L. Spriet, and M. I. Lindinger
Fluid and electrolyte supplementation after prolonged moderate-intensity exercise enhances muscle glycogen resynthesis in Standardbred horses
J Appl Physiol, January 1, 2009; 106(1): 91 - 100.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. E. Pratt, R. J. Geor, L. L. Spriet, and L. J. McCutcheon
Time course of insulin sensitivity and skeletal muscle glycogen synthase activity after a single bout of exercise in horses
J Appl Physiol, September 1, 2007; 103(3): 1063 - 1069.
[Abstract] [Full Text] [PDF]

Home page
 J ANIM SCIHome page
E. Jose-Cunilleras, L. E. Taylor, and K. W. Hinchcliff
Glycemic index of cracked corn, oat groats and rolled barley in horses
J Anim Sci, September 1, 2004; 82(9): 2623 - 2629.
[Abstract] [Full Text] [PDF]


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