Document Detail

Non-invasive prediction of blood lactate response to constant power outputs from incremental exercise tests.
MedLine Citation:
PMID:  8549579     Owner:  NLM     Status:  MEDLINE    
We determined the ability of gas exchange analyses during incremental exercise tests (IXT) to predict blood lactate levels associated with a range of constant power output cycle ergometer tests. Twenty-seven healthy young men performed duplicate IXT and four 15-min constant power output tests at intensities ranging from moderate to very severe, before and after a training program. End-exercise blood lactate levels were approximated from superficial venous samples obtained 60 s after each constant power output test. From IXT, the power outputs corresponding to peak oxygen uptake (Wmax) and lactic acidosis threshold (WLAT), were determined. We examined the ability of four measures of exercise intensity to predict blood lactate levels for power outputs above the LAT: (1) power output (W), (2) power difference (W-WLAT), (3) power fraction (W/Wmax) and (4) power difference to delta ratio [(W-WLAT)/(Wmax-WLAT)]. Correlation coefficients were r = 0.38, 0.69, 0.75, and 0.81, respectively. The best linear regression prediction equation was: lactate (mmol.l-1) = 12.2[(W-WLAT)/(Wmax-WLAT)] + 0.7 mmol.l-1. This relationship was not significantly affected by training, despite increased values of LAT and peak oxygen uptake. Normalizing exercise intensity to the range of power outputs between WLAT and Wmax provided an estimate of blood lactate response to constant power outputs with a standard error of the estimate of 1.66 mmol.l-1.
C S Sullivan; R Casaburi; T W Storer; K Wasserman
Related Documents :
15676059 - Elevations in core and muscle temperature impairs repeated sprint performance.
24738079 - Reliability of a simple physical therapist screening tool to assess errors during resis...
17473779 - Effect of vibration training in maximal effort (70% 1rm) dynamic bicep curls.
20979659 - Long-term glycine propionyl-l-carnitine supplemention and paradoxical effects on repeat...
17645369 - Distribution of power output during cycling: impact and mechanisms.
10527319 - Physiological responses to upper body exercise on an arm and a modified leg ergometer.
8449059 - Exercise-related potassium and free fatty acid level changes in coronary artery disease...
12003829 - Nitric oxide production is maintained in exercising swine with chronic left ventricular...
16172589 - The role of balance and agility training in fall reduction. a comprehensive review.
Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  71     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1995  
Date Detail:
Created Date:  1996-02-22     Completed Date:  1996-02-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  349-54     Citation Subset:  IM; S    
Division of Respiratory and Critical Care, Physiology and Medicine, Harbor-UCLA Medical Center, Torrance 90509, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Anaerobic Threshold / physiology
Energy Metabolism / physiology*
Exercise Test*
Lactates / blood*
Lactic Acid
Oxygen Consumption / physiology
Pulmonary Gas Exchange / physiology
Reg. No./Substance:
0/Lactates; 50-21-5/Lactic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Muscle strength during bedrest with and without muscle exercise as a countermeasure.
Next Document:  Energy cost and energy sources in karate.