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


     

J Appl Physiol 79: 838-845, 1995;
8750-7587/95 $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
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 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 Womack, C. J.
Right arrow Articles by Gaesser, G. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Womack, C. J.
Right arrow Articles by Gaesser, G. A.

Journal of Applied Physiology, Vol 79, Issue 3 838-845, Copyright © 1995 by American Physiological Society

ARTICLES

Slow component of O2 uptake during heavy exercise: adaptation to endurance training

C. J. Womack, S. E. Davis, J. L. Blumer, E. Barrett, A. L. Weltman and G. A. Gaesser
Exercise Physiology Laboratory, University of Virginia, Charlottesville 22903, USA.

Seven untrained male subjects [age 25.6 +/- 1.5 (SE) yr, peak O2 uptake (VO2) 3.20 +/- 0.19 l/min] trained on a cycle ergometer 4 days/wk for 6 wk, with the absolute training workload held constant for the duration of training. Before and at the end of each week of training, the subjects performed 20 min of constant-power exercise at a power designed to elicit a pronounced slow component of VO2 (end-exercise VO2-VO2 at minute 3 of exercise) in the pretraining session. An additional 20-min exercise bout was performed after training at this same absolute power output during which epinephrine (Epi) was infused at a rate of 100 ng.kg-1.min-1 between minutes 10 and 20. After 2 wk of training, significant decreases in VO2 slow component, end-exercise VO2, blood lactate ([La-] and glucose concentrations, plasma Epi ([Epi]) and norepinephrine concentrations, ventilation (VE), and heart rate (HR) were observed (P < 0.05). Although the rapid attenuation of the VO2 slow component coincided temporally with reductions in plasma [Epi], blood [La-], and VE, the infusion of Epi after training significantly increased plasma [Epi] (delta 2.22 ng/ml), blood [La-] (delta 2.4 mmol/l) and VE (delta 10.0 l/min) without any change in exercise VO2. We therefore conclude that diminution of the VO2 slow component with training is attributable to factors other than the reduction in plasma [Epi], blood [La-] and VE.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
S. J. Bailey, D. P. Wilkerson, F. J. DiMenna, and A. M. Jones
Influence of repeated sprint training on pulmonary O2 uptake and muscle deoxygenation kinetics in humans
J Appl Physiol, June 1, 2009; 106(6): 1875 - 1887.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
P. Krustrup, Y. Hellsten, and J. Bangsbo
Intense interval training enhances human skeletal muscle oxygen uptake in the initial phase of dynamic exercise at high but not at low intensities
J. Physiol., August 15, 2004; 559(1): 335 - 345.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. G. Fawkner and N. Armstrong
Longitudinal changes in the kinetic response to heavy-intensity exercise in children
J Appl Physiol, August 1, 2004; 97(2): 460 - 466.
[Abstract] [Full Text] [PDF]

Home page
 ChestHome page
J. V. Ocel, L. E. Miller, L. M. Pierson, D. F. Wootten, B. J. Hawkins, J. Myers, and W. G. Herbert
Adaptation of Pulmonary Oxygen Consumption Slow Component Following 6 Weeks of Exercise Training Above and Below the Lactate Threshold in Untrained Men
Chest, December 1, 2003; 124(6): 2377 - 2383.
[Abstract] [Full Text] [PDF]

Home page
 Br. J. Sports. Med.Home page
M Perez, A Lucia, A Santalla, and J L Chicharro
Effects of electrical stimulation on VO2 kinetics and delta efficiency in healthy young men
Br. J. Sports Med., April 1, 2003; 37(2): 140 - 143.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
F. Borrani, R. Candau, G. Y. Millet, S. Perrey, J. Fuchslocher, and J. D. Rouillon
Is the {V}O2 slow component dependent on progressive recruitment of fast-twitch fibers in trained runners?
J Appl Physiol, June 1, 2001; 90(6): 2212 - 2220.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. P. Demarle, J. J. Slawinski, L. P. Laffite, V. G. Bocquet, J. P. Koralsztein, and V. L. Billat
Decrease of O2 deficit is a potential factor in increased time to exhaustion after specific endurance training
J Appl Physiol, March 1, 2001; 90(3): 947 - 953.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
H. Carter, A. M. Jones, T. J. Barstow, M. Burnley, C. Williams, and J. H. Doust
Effect of endurance training on oxygen uptake kinetics during treadmill running
J Appl Physiol, November 1, 2000; 89(5): 1744 - 1752.
[Abstract] [Full Text] [PDF]

Home page
 Br. J. Sports. Med.Home page
A. Lucia, J. Hoyos, and J. L Chicharro
The slow component of {V}O2 in professional cyclists
Br. J. Sports Med., October 1, 2000; 34(5): 367 - 374.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
H. Carter, A. M. Jones, T. J. Barstow, M. Burnley, C. A. Williams, and J. H. Doust
Oxygen uptake kinetics in treadmill running and cycle ergometry: a comparison
J Appl Physiol, September 1, 2000; 89(3): 899 - 907.
[Abstract] [Full Text] [PDF]

Home page
 Br. J. Sports. Med.Home page
V. L Billat
{V}O2 slow component and performance in endurance sports
Br. J. Sports Med., April 1, 2000; 34(2): 83 - 85.
[Full Text] [PDF]


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