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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2019
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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(.) |
format | Online Article Text |
id | pubmed-6647242 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
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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