| Predicting lactate threshold using ventilatory threshold. | |
| | |
MedLine Citation:
|
PMID: 18214811 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Lactate threshold is an important reference point when setting training intensities for endurance athletes. Ventilatory threshold has been used as a noninvasive estimate of lactate threshold, but appears to underestimate training intensity for many athletes. This study evaluated whether data obtained during a noninvasive, maximal exercise test could be used to predict lactate threshold. Maximal oxygen consumption (55+/-2 ml O(2) x kg(-1) x min(-1)) and heart rate at the ventilatory threshold (V-slope method) were determined for 19 cyclists (10 men, 9 women, 35+/-2 years). Cyclists also performed a lactate threshold test, consisting of 8 min stages at power outputs below, at, and above the ventilatory threshold. Heart rate associated with the lactate threshold was determined using the Dmax method. The correlation coefficient between heart rates at the ventilatory and lactate thresholds was 0.67, indicating 45% shared variance. The best fitting model to predict heart rate at the lactate threshold included heart rate at the ventilatory threshold, gender, body weight, and an interaction between gender and body weight. Using this model, R(2) was 0.70. Thus, heart rate at the ventilatory threshold may be adjusted to more accurately predict a heart rate that corresponds to the lactate threshold for recreational cyclists. |
| | |
Authors:
|
P A Plato; M McNulty; S M Crunk; A Tug Ergun |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2008-01-23 |
Journal Detail:
|
Title: International journal of sports medicine Volume: 29 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2008 Sep |
Date Detail:
|
Created Date: 2008-08-06 Completed Date: 2009-01-16 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
|
Languages: eng Pagination: 732-7 Citation Subset: IM |
Affiliation:
|
Department of Kinesiology, San Jose State University, San Jose, California 95192-0054, United States. plato@kin.sjsu.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Anaerobic Threshold / physiology* Bicycling / physiology* Exercise Test* Exercise Tolerance / physiology* Female Heart Rate Humans Lactic Acid / blood* Male Muscle Contraction / physiology Muscle, Skeletal / physiology Oxygen Consumption / physiology Predictive Value of Tests Pulmonary Gas Exchange / physiology* Regression Analysis |
| Chemical | |
Reg. No./Substance:
|
50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: A study on metals content in patients with colorectal polyps.
Next Document: Goal orientations and attitudes toward doping.