Skip to main content

Research Repository

Advanced Search

Model free endurance markers based on the second derivative of blood lactate curves

Newell, John; Einbeck, Jochen; Madden, Niall; McMillan, Kenny

Authors

John Newell

Niall Madden

Kenny McMillan



Contributors

A. R. Francis
Editor

K. M. Matawie
Editor

A. Oshlack
Editor

G. K. Smyth
Editor

Abstract

Blood lactate assessment is used regularly by exercise physiologists as a predictor of endurance performance. Typically fingertip blood samples are collected at selected running speeds on a treadmill and a plot of lactate concentration against workload (e.g. treadmill speed) is presented. Several features of the lactate curve have been suggested as markers for endurance. Typically these features, or endurance markers, are used to monitor changes in aerobic fitness, set training regimes and predict endurance performance. Determination of these markers however can be problematic (Weltman, 1995). In order to explore the structure of lactate curves, Functional Data Analysis (FDA) techniques are applied to provide graphical summaries. A new nonparametric endurance marker is then presented which corresponds to the point of maximum acceleration in the lactate curve. Using smoothing splines it is easily calculated by examining the second derivative of the smoothed lactate response. In addition we propose a simple discrete approximation to this marker.

Citation

Newell, J., Einbeck, J., Madden, N., & McMillan, K. (2005). Model free endurance markers based on the second derivative of blood lactate curves. In A. R. Francis, K. M. Matawie, A. Oshlack, & G. K. Smyth (Eds.), Statistical solutions to modern problems ; proceedings of the 20th International Workshop on Statistical Modelling. Sydney, Australia, July 10-15, 2005 (357-364)

Conference Name 20th International Workshop on Statistical Modelling.
Conference Location Sydney
Publication Date Jul 1, 2005
Deposit Date Apr 22, 2016
Publicly Available Date Mar 29, 2024
Pages 357-364
Series Title Proceedings of the IWSM.
Book Title Statistical solutions to modern problems ; proceedings of the 20th International Workshop on Statistical Modelling. Sydney, Australia, July 10-15, 2005.
Keywords Breakpoint detection, Endurance markers, Smoothing splines
Public URL https://durham-repository.worktribe.com/output/1161924
Publisher URL http://www.statmod.org/workshops_archive_proceedings_2005.htm