View in EDS

Oxygen uptake dynamics: from muscle to mouth -- an introduction to the symposium.

Saved in:
Bibliographic Details
Title: Oxygen uptake dynamics: from muscle to mouth -- an introduction to the symposium.
Authors: Jones AM (AUTHOR), Poole DC (AUTHOR)
Source: Medicine & Science in Sports & Exercise. Sep2005, Vol. 37 Issue 9, p1542-1550. 9p.
Abstract: The purpose of this paper is to provide an introduction to the study of oxygen uptake (VO(2)) dynamics or kinetics. Following the onset of exercise, both muscle and pulmonary VO(2) rise in a near-exponential fashion towards the anticipated 'steady-state' VO(2) demand. However, it can take 2-4 min, or even longer at higher work rates, before this steady state is attained. Slow VO(2) kinetics increase the so-called O(2) deficit and obligate a greater contribution from anaerobic mechanisms of ATP production (involving the breakdown of muscle high energy phosphates and lactate production from glycogen) to meet the ATP requirement of the exercise task. A primary goal in this area of research is therefore to elucidate the physiological mechanisms which control and/or limit the rate at which muscle VO(2) increases following the onset of exercise. At higher intensities of exercise, a continued increase in both muscle and pulmonary VO(2) is observed with time despite the external work rate remaining constant. This continued rise in VO(2), beyond the anticipated steady-state requirement for the work rate, has been termed the VO(2) 'slow component,' and establishing the mechanistic basis for this phenomenon is another important goal of research in this field. This paper provides an overview of some of the factors which might contribute to both the fundamental and slow phases of the VO(2) kinetics and, in so doing, provides general background material for the more specific papers that follow. [ABSTRACT FROM AUTHOR]
Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
Description
Abstract:The purpose of this paper is to provide an introduction to the study of oxygen uptake (VO(2)) dynamics or kinetics. Following the onset of exercise, both muscle and pulmonary VO(2) rise in a near-exponential fashion towards the anticipated 'steady-state' VO(2) demand. However, it can take 2-4 min, or even longer at higher work rates, before this steady state is attained. Slow VO(2) kinetics increase the so-called O(2) deficit and obligate a greater contribution from anaerobic mechanisms of ATP production (involving the breakdown of muscle high energy phosphates and lactate production from glycogen) to meet the ATP requirement of the exercise task. A primary goal in this area of research is therefore to elucidate the physiological mechanisms which control and/or limit the rate at which muscle VO(2) increases following the onset of exercise. At higher intensities of exercise, a continued increase in both muscle and pulmonary VO(2) is observed with time despite the external work rate remaining constant. This continued rise in VO(2), beyond the anticipated steady-state requirement for the work rate, has been termed the VO(2) 'slow component,' and establishing the mechanistic basis for this phenomenon is another important goal of research in this field. This paper provides an overview of some of the factors which might contribute to both the fundamental and slow phases of the VO(2) kinetics and, in so doing, provides general background material for the more specific papers that follow. [ABSTRACT FROM AUTHOR]
ISSN:01959131
DOI:10.1249/01.mss.0000177466.01232.7e