Cargando…

On the kinetics of anaerobic power

BACKGROUND: This study investigated two different mathematical models for the kinetics of anaerobic power. Model 1 assumes that the work power is linear with the work rate, while Model 2 assumes a linear relationship between the alactic anaerobic power and the rate of change of the aerobic power. In...

Descripción completa

Detalles Bibliográficos
Autores principales: Moxnes, John F, Hausken, Kjell, Sandbakk, Øyvind
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548746/
https://www.ncbi.nlm.nih.gov/pubmed/22830586
http://dx.doi.org/10.1186/1742-4682-9-29
_version_ 1782256361220866048
author Moxnes, John F
Hausken, Kjell
Sandbakk, Øyvind
author_facet Moxnes, John F
Hausken, Kjell
Sandbakk, Øyvind
author_sort Moxnes, John F
collection PubMed
description BACKGROUND: This study investigated two different mathematical models for the kinetics of anaerobic power. Model 1 assumes that the work power is linear with the work rate, while Model 2 assumes a linear relationship between the alactic anaerobic power and the rate of change of the aerobic power. In order to test these models, a cross country skier ran with poles on a treadmill at different exercise intensities. The aerobic power, based on the measured oxygen uptake, was used as input to the models, whereas the simulated blood lactate concentration was compared with experimental results. Thereafter, the metabolic rate from phosphocreatine break down was calculated theoretically. Finally, the models were used to compare phosphocreatine break down during continuous and interval exercises. RESULTS: Good similarity was found between experimental and simulated blood lactate concentration during steady state exercise intensities. The measured blood lactate concentrations were lower than simulated for intensities above the lactate threshold, but higher than simulated during recovery after high intensity exercise when the simulated lactate concentration was averaged over the whole lactate space. This fit was improved when the simulated lactate concentration was separated into two compartments; muscles + internal organs and blood. Model 2 gave a better behavior of alactic energy than Model 1 when compared against invasive measurements presented in the literature. During continuous exercise, Model 2 showed that the alactic energy storage decreased with time, whereas Model 1 showed a minimum value when steady state aerobic conditions were achieved. During interval exercise the two models showed similar patterns of alactic energy. CONCLUSIONS: The current study provides useful insight on the kinetics of anaerobic power. Overall, our data indicate that blood lactate levels can be accurately modeled during steady state, and suggests a linear relationship between the alactic anaerobic power and the rate of change of the aerobic power.
format Online
Article
Text
id pubmed-3548746
institution National Center for Biotechnology Information
language English
publishDate 2012
publisher BioMed Central
record_format MEDLINE/PubMed
spelling pubmed-35487462013-02-04 On the kinetics of anaerobic power Moxnes, John F Hausken, Kjell Sandbakk, Øyvind Theor Biol Med Model Research BACKGROUND: This study investigated two different mathematical models for the kinetics of anaerobic power. Model 1 assumes that the work power is linear with the work rate, while Model 2 assumes a linear relationship between the alactic anaerobic power and the rate of change of the aerobic power. In order to test these models, a cross country skier ran with poles on a treadmill at different exercise intensities. The aerobic power, based on the measured oxygen uptake, was used as input to the models, whereas the simulated blood lactate concentration was compared with experimental results. Thereafter, the metabolic rate from phosphocreatine break down was calculated theoretically. Finally, the models were used to compare phosphocreatine break down during continuous and interval exercises. RESULTS: Good similarity was found between experimental and simulated blood lactate concentration during steady state exercise intensities. The measured blood lactate concentrations were lower than simulated for intensities above the lactate threshold, but higher than simulated during recovery after high intensity exercise when the simulated lactate concentration was averaged over the whole lactate space. This fit was improved when the simulated lactate concentration was separated into two compartments; muscles + internal organs and blood. Model 2 gave a better behavior of alactic energy than Model 1 when compared against invasive measurements presented in the literature. During continuous exercise, Model 2 showed that the alactic energy storage decreased with time, whereas Model 1 showed a minimum value when steady state aerobic conditions were achieved. During interval exercise the two models showed similar patterns of alactic energy. CONCLUSIONS: The current study provides useful insight on the kinetics of anaerobic power. Overall, our data indicate that blood lactate levels can be accurately modeled during steady state, and suggests a linear relationship between the alactic anaerobic power and the rate of change of the aerobic power. BioMed Central 2012-07-25 /pmc/articles/PMC3548746/ /pubmed/22830586 http://dx.doi.org/10.1186/1742-4682-9-29 Text en Copyright ©2012 Moxnes et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Moxnes, John F
Hausken, Kjell
Sandbakk, Øyvind
On the kinetics of anaerobic power
title On the kinetics of anaerobic power
title_full On the kinetics of anaerobic power
title_fullStr On the kinetics of anaerobic power
title_full_unstemmed On the kinetics of anaerobic power
title_short On the kinetics of anaerobic power
title_sort on the kinetics of anaerobic power
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548746/
https://www.ncbi.nlm.nih.gov/pubmed/22830586
http://dx.doi.org/10.1186/1742-4682-9-29
work_keys_str_mv AT moxnesjohnf onthekineticsofanaerobicpower
AT hauskenkjell onthekineticsofanaerobicpower
AT sandbakkøyvind onthekineticsofanaerobicpower