Document Detail

A Novel Approach for Lactate Threshold Assessment Based on RPE.
MedLine Citation:
PMID:  22954509     Owner:  NLM     Status:  Publisher    
This study aimed to test the hypothesis that the DMAX (for maximal distance) method could be applied to ratings of perceived exertion (RPE), in order to propose a novel method for individual detection of the lactate threshold (LT) using RPE alone during an incremental test to exhaustion. Twenty-one participants performed an incremental test on cycle ergometer. At the end of each stage, lactate concentration was measured and the participants estimated RPE using the Borg CR100 scale. The intensity corresponding to the fixed lactate values of 2 or 4 mmol.L-1 (2mM and 4mM), the ventilatory threshold (VT), the respiratory compensation point (RCP) and the instant of equality of pulmonary gas exchange (RER=1.00) were determined. Lactate (DMAX La) and RPE (DMAX RPE) thresholds were determined using the DMAX method. Oxygen uptake (VO2), heart rate (HR) and power output (PO) measured at DMAX RPE and at DMAX La were not statistically different. Bland-Altman plots showed small bias and good agreements when DMAX RPE was compared with DMAX La and RER=1.00 methods (bias=-0.05% and -2% of VO2MAX respectively). Conversely, VO2 from the DMAX RPE method was lower than VO2 at 4mM and at RCP and was higher than VO2 at 2mM and at VT. VO2 at DMAX RPE was strongly correlated with VO2 at DMAX La (r=0.97), at RER=1.00 (r=0.97) at 2mM (r=0.85), at 4mM (r=0.93), at VT (r=0.95) and at RCP (r=0.95). The combination of the DMAX method with the RPE responses permitted precise and individualized estimates of LT determined using the DMAX method.
Nicolas Fabre; Laurent Mourot; Livio Zerbini; Barbara Pellegrini; Lorenzo Bortolan; Federico Schena
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-5
Journal Detail:
Title:  International journal of sports physiology and performance     Volume:  -     ISSN:  1555-0265     ISO Abbreviation:  Int J Sports Physiol Perform     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101276430     Medline TA:  Int J Sports Physiol Perform     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Swedish Winter Sports Research Centre, Department of Health Sciences, Mid Sweden University, Östersund, Sweden and also CeRiSM, Research Center for Sport, Mountain and Health, Rovereto, Italy.
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