The University of Southampton
University of Southampton Institutional Repository

Reproducibility of lactate markers during 4 and 8 min stage incremental running: a pilot study

Reproducibility of lactate markers during 4 and 8 min stage incremental running: a pilot study
Reproducibility of lactate markers during 4 and 8 min stage incremental running: a pilot study

OBJECTIVES: This study examined the reproducibility of speed corresponding to specific lactate markers during incremental treadmill running of normal and prolonged stage durations.

DESIGN: Nineteen healthy participants (14 male, 5 female) performed repeated, incremental treadmill running trials of 4 and 8 min stages on separate days to examine the test-retest reproducibility of speed at lactate markers. Two trials were completed for each duration in a randomised order.

METHODS: Fingertip blood samples drawn upon stage completion were analysed for plasma lactate, then used to determine running speed at: 2.0, 3.5, and 4.0 mmol l(-1) fixed blood lactate accumulations (FBLA), a 1 mmol l(-1) rise from baseline, and the markers: the deviation maximum (Dmax), the Dmax of the second curve derivative (D2L(max)), the lactate threshold (LT) and log-log LT.

RESULTS: The 2.0 mmol l(-1) FBLA reported the lowest mean bias between 4 min trials (-0.06 km h(-1)), with the narrowest limits of agreement (LoA) (-1.78 to 1.66 km h(-1)). The Dmax had the second lowest bias (0.14 km h(-1)), D2L(max) the second narrowest LoA (-1.93 to 2.90 km h(-1)). For 8 min stages, the 1 mmol l(-1) rise demonstrated, low mean bias (-0.13 km h(-1)) and narrowest LoA (-1.22 to 0.97 km h(-1)) between trials.

CONCLUSIONS: This preliminary report suggests the reproducibility of running speed at lactate summary markers is influenced by stage duration for incremental treadmill running. Varied marker reproducibility between 4 and 8 min stages indicates different blood lactate response, and therefore workload calculation, according to stage length. Consideration of marker construct is recommended.

Adult, Biomarkers, Female, Healthy Volunteers, Humans, Lactic Acid, Male, Pilot Projects, Reproducibility of Results, Running, Time Factors, Young Adult, Journal Article
1440-2440
635-639
Gavin, James P.
e0d9b404-3f63-4855-8e64-bf1692e6cc3f
Willems, Marc E.T.
403242a2-7f54-4f8a-887d-d501ae5db0eb
Myers, Steve D.
f1f200f5-f5b1-4eab-8542-4d435b50ed33
Gavin, James P.
e0d9b404-3f63-4855-8e64-bf1692e6cc3f
Willems, Marc E.T.
403242a2-7f54-4f8a-887d-d501ae5db0eb
Myers, Steve D.
f1f200f5-f5b1-4eab-8542-4d435b50ed33

Gavin, James P., Willems, Marc E.T. and Myers, Steve D. (2014) Reproducibility of lactate markers during 4 and 8 min stage incremental running: a pilot study. Journal of Science and Medicine in Sport, 17 (6), 635-639. (doi:10.1016/j.jsams.2013.08.006).

Record type: Article

Abstract

OBJECTIVES: This study examined the reproducibility of speed corresponding to specific lactate markers during incremental treadmill running of normal and prolonged stage durations.

DESIGN: Nineteen healthy participants (14 male, 5 female) performed repeated, incremental treadmill running trials of 4 and 8 min stages on separate days to examine the test-retest reproducibility of speed at lactate markers. Two trials were completed for each duration in a randomised order.

METHODS: Fingertip blood samples drawn upon stage completion were analysed for plasma lactate, then used to determine running speed at: 2.0, 3.5, and 4.0 mmol l(-1) fixed blood lactate accumulations (FBLA), a 1 mmol l(-1) rise from baseline, and the markers: the deviation maximum (Dmax), the Dmax of the second curve derivative (D2L(max)), the lactate threshold (LT) and log-log LT.

RESULTS: The 2.0 mmol l(-1) FBLA reported the lowest mean bias between 4 min trials (-0.06 km h(-1)), with the narrowest limits of agreement (LoA) (-1.78 to 1.66 km h(-1)). The Dmax had the second lowest bias (0.14 km h(-1)), D2L(max) the second narrowest LoA (-1.93 to 2.90 km h(-1)). For 8 min stages, the 1 mmol l(-1) rise demonstrated, low mean bias (-0.13 km h(-1)) and narrowest LoA (-1.22 to 0.97 km h(-1)) between trials.

CONCLUSIONS: This preliminary report suggests the reproducibility of running speed at lactate summary markers is influenced by stage duration for incremental treadmill running. Varied marker reproducibility between 4 and 8 min stages indicates different blood lactate response, and therefore workload calculation, according to stage length. Consideration of marker construct is recommended.

Text
Gavin et al. 2014 - Version of Record
Restricted to Repository staff only
Request a copy

More information

e-pub ahead of print date: 29 August 2013
Published date: November 2014
Keywords: Adult, Biomarkers, Female, Healthy Volunteers, Humans, Lactic Acid, Male, Pilot Projects, Reproducibility of Results, Running, Time Factors, Young Adult, Journal Article

Identifiers

Local EPrints ID: 428734
URI: http://eprints.soton.ac.uk/id/eprint/428734
ISSN: 1440-2440
PURE UUID: f4cb7262-e301-4e91-a1ac-e92d9979a2ad
ORCID for James P. Gavin: ORCID iD orcid.org/0000-0003-0574-0502

Catalogue record

Date deposited: 07 Mar 2019 17:30
Last modified: 16 Mar 2024 04:40

Export record

Altmetrics

Contributors

Author: James P. Gavin ORCID iD
Author: Marc E.T. Willems
Author: Steve D. Myers

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×