Int J Sports Med 2014; 35(06): 517-521
DOI: 10.1055/s-0033-1353176
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Comparison of Selected Lactate Threshold Parameters with Maximal Lactate Steady State in Cycling

T. Hauser*
1  Sportsmedicine/-biology, Chemnitz University of Technology, Chemnitz, Germany
,
J. Adam*
2  Department of Internal Medicine/Cardiology, University of Leipzig, Heart Centre, Leipzig, Germany
,
H. Schulz
1  Sportsmedicine/-biology, Chemnitz University of Technology, Chemnitz, Germany
› Author Affiliations
Further Information

Publication History



accepted after revision 14 July 2013

Publication Date:
13 November 2013 (eFirst)

Abstract

The aim of the present investigation was to compare power at “onset of blood lactate accumulation” (OBLA), “individual anaerobic threshold” (IAT) and “+1.5 mmol ∙ l−1 lactate model” with power in maximal lactate steady state (MLSS) in cycling. However, there is a lack of studies concerning the absolute individual differences between different lactate parameters and MLSS.

A total of 57 male participants performed several 30-min constant-load tests to determine MLSS by measuring blood lactate concentration (BLC). Depending on BLC, power was increased or decreased by 10 W in the following 30-min test. For detecting power at different threshold parameters, an incremental test was performed that began at 40 W and increased by 40 W every 4 min.

Highly significant correlations were found between OBLA and MLSS: r=0.89 (mean difference −7.4 W); IAT and MLSS: r=0.83 (mean difference 12.4W), “+1.5 mmol ∙ l−1 lactate model” and MLSS: r=0.88 (mean difference −37.4W). On average, the parameters of OBLA and IAT approximate MLSS with no significant differences. The “+1.5 mmol ∙ l−1 lactate model” underestimates MLSS significantly.

Based on Bland-and-Altman, the comparison of power of all threshold parameters with power in MLSS shows great individual differences despite the high regression coefficients and low mean differences between these methods.

* These authors contributed equally to this article.