| A new approach for the determination of ventilatory and lactate thresholds. | |
| | |
MedLine Citation:
|
PMID: 1459746 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In order to determine the ventilatory threshold (VT) and the lactate threshold (LT) in a reliable way, a new method is proposed and compared with conventional methods. The new method consists of calculating the point that yields the maximal distance from a curve representing ventilatory and metabolic variables as a function of oxygen uptake (VO2) to the line formed by the two end points of the curve (Dmax method). Male cyclists (n = 8) performed two incremental exercise tests a week apart. Ventilatory/metabolic variables were measured and blood was sampled for later lactate measurement during each workload and immediately after exercise. No statistical differences were observed in the threshold values (expressed as absolute oxygen uptake; VO2) determined by the Dmax method and the conventional linear regression method (according to O2 equivalent; EqO2) and venous blood at the onset of blood lactate (OBLA), while VT assessed with the conventional linear method (according to the slope of CO2 output; Vslope) yielded significantly lower threshold values. Similar results were obtained from the reproducibility test. Thus, the Dmax method appears to be an objective and reliable method for threshold determination, which can be applied to various ventilatory or metabolic variables yet yield similar results. The results also showed that breathing frequency can be used to determine VT. |
| | |
Authors:
|
B Cheng; H Kuipers; A C Snyder; H A Keizer; A Jeukendrup; M Hesselink |
Related Documents
:
|
7129726 - Hormonal and metabolic consequences of prolonged running at the individual anaerobic th... 3742956 - Muscle ammonia and amino acid metabolism during dynamic exercise in man. 8846536 - The effect of erythropoietin on lactate, pyruvate and excess lactate under physical exe... 21399536 - Acute arginine supplementation fails to improve muscle endurance or affect blood pressu... 10454306 - Intraventricular conduction delay: a prognostic marker in chronic heart failure. 16104916 - Pelvic floor exercises for erectile dysfunction. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: International journal of sports medicine Volume: 13 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 1992 Oct |
Date Detail:
|
Created Date: 1993-01-12 Completed Date: 1993-01-12 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: GERMANY |
Other Details:
|
Languages: eng Pagination: 518-22 Citation Subset: IM |
Affiliation:
|
Department of Physiology, University of Limburg, Maastricht, The Netherlands. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adolescent Adult Anaerobic Threshold* Bicycling / physiology* Exercise Test* Humans Lactates / blood Male Reproducibility of Results Respiration* |
| Chemical | |
Reg. No./Substance:
|
0/Lactates |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Determining the variability of performance on Wingate anaerobic tests in children aged 6-12 years.
Next Document: Accuracy of pulse oximetry during exercise stress testing.