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Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners

PURPOSE: The use of oxygen cost ([Formula: see text] (aero)) parameters to predict endurance performance has recently been criticized. Instead, it is suggested that aerobic energy cost ([Formula: see text] ) provides greater validity; however, a comparison of these quantification methods has not pre...

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Detalles Bibliográficos
Autores principales: Blagrove, Richard C., Howatson, Glyn, Pedlar, Charles R., Hayes, Philip R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6647242/
https://www.ncbi.nlm.nih.gov/pubmed/31209572
http://dx.doi.org/10.1007/s00421-019-04175-w
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author Blagrove, Richard C.
Howatson, Glyn
Pedlar, Charles R.
Hayes, Philip R.
author_facet Blagrove, Richard C.
Howatson, Glyn
Pedlar, Charles R.
Hayes, Philip R.
author_sort Blagrove, Richard C.
collection PubMed
description PURPOSE: The use of oxygen cost ([Formula: see text] (aero)) parameters to predict endurance performance has recently been criticized. Instead, it is suggested that aerobic energy cost ([Formula: see text] ) provides greater validity; however, a comparison of these quantification methods has not previously been made. METHODS: Fifty-six male (n = 34) and female (n = 22) competitive adolescent (17 ± 1 years) middle-distance runners participated in a sub-maximal and maximal incremental treadmill test. Running economy (RE) was measured at the speed corresponding to lactate turnpoint, and the three speeds prior. Maximal oxygen uptake ([Formula: see text] O(2)max), speed at [Formula: see text] O(2)max and fraction of [Formula: see text] O(2)max utilized across a range of intensities, and speeds from 0.8, 1.5 and 3 km races were also quantified. RE and fractional utilization were calculated in units of [Formula: see text] (aero) and [Formula: see text] (aero). RESULTS: Multiple linear regression models demonstrated no discernible difference in the predictive capability of RE, fractional utilization and [Formula: see text] O(2)max when expressed as [Formula: see text] (aero) or [Formula: see text] (aero) in both sexes. When plotted as a function of running speed, [Formula: see text] (aero) displayed a stepwise decrease (F = 11.59, p < 0.001) whereas [Formula: see text] (aero) exhibited a curvilinear response (F = 4.74, p = 0.015). Differences were also evident in the slopes plotted for %[Formula: see text] O(2)max and %[Formula: see text] (aero)max against running speed (F = 5.38, p = 0.021). CONCLUSIONS: Quantifying aerobic determinants of performance in units of [Formula: see text] (aero) provides no greater validity compared to [Formula: see text] (aero)-based measurement. Although both [Formula: see text] (aero) and [Formula: see text] (aero) are sensitive to changes in speed, [Formula: see text] (aero) provides the more valid reflection of the underlying metabolic cost of running. Physiologists should also be aware of the potential differences between expression of aerobic running intensity based upon %[Formula: see text] O(2)max compared to %[Formula: see text] (aero)max(.)
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spelling pubmed-66472422019-08-06 Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners Blagrove, Richard C. Howatson, Glyn Pedlar, Charles R. Hayes, Philip R. Eur J Appl Physiol Original Article PURPOSE: The use of oxygen cost ([Formula: see text] (aero)) parameters to predict endurance performance has recently been criticized. Instead, it is suggested that aerobic energy cost ([Formula: see text] ) provides greater validity; however, a comparison of these quantification methods has not previously been made. METHODS: Fifty-six male (n = 34) and female (n = 22) competitive adolescent (17 ± 1 years) middle-distance runners participated in a sub-maximal and maximal incremental treadmill test. Running economy (RE) was measured at the speed corresponding to lactate turnpoint, and the three speeds prior. Maximal oxygen uptake ([Formula: see text] O(2)max), speed at [Formula: see text] O(2)max and fraction of [Formula: see text] O(2)max utilized across a range of intensities, and speeds from 0.8, 1.5 and 3 km races were also quantified. RE and fractional utilization were calculated in units of [Formula: see text] (aero) and [Formula: see text] (aero). RESULTS: Multiple linear regression models demonstrated no discernible difference in the predictive capability of RE, fractional utilization and [Formula: see text] O(2)max when expressed as [Formula: see text] (aero) or [Formula: see text] (aero) in both sexes. When plotted as a function of running speed, [Formula: see text] (aero) displayed a stepwise decrease (F = 11.59, p < 0.001) whereas [Formula: see text] (aero) exhibited a curvilinear response (F = 4.74, p = 0.015). Differences were also evident in the slopes plotted for %[Formula: see text] O(2)max and %[Formula: see text] (aero)max against running speed (F = 5.38, p = 0.021). CONCLUSIONS: Quantifying aerobic determinants of performance in units of [Formula: see text] (aero) provides no greater validity compared to [Formula: see text] (aero)-based measurement. Although both [Formula: see text] (aero) and [Formula: see text] (aero) are sensitive to changes in speed, [Formula: see text] (aero) provides the more valid reflection of the underlying metabolic cost of running. Physiologists should also be aware of the potential differences between expression of aerobic running intensity based upon %[Formula: see text] O(2)max compared to %[Formula: see text] (aero)max(.) Springer Berlin Heidelberg 2019-06-17 2019 /pmc/articles/PMC6647242/ /pubmed/31209572 http://dx.doi.org/10.1007/s00421-019-04175-w Text en © The Author(s) 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Article
Blagrove, Richard C.
Howatson, Glyn
Pedlar, Charles R.
Hayes, Philip R.
Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title_full Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title_fullStr Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title_full_unstemmed Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title_short Quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
title_sort quantification of aerobic determinants of performance in post-pubertal adolescent middle-distance runners
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6647242/
https://www.ncbi.nlm.nih.gov/pubmed/31209572
http://dx.doi.org/10.1007/s00421-019-04175-w
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