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Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm
Obesity is thought to be associated with a reduced capacity to increase fat oxidation in response to physical exercise; however, scientific evidence supporting this paradigm remains scarce. This study aimed to determine the interrelationship of different submaximal exercise metabolic flexibility (Me...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8297250/ https://www.ncbi.nlm.nih.gov/pubmed/34209545 http://dx.doi.org/10.3390/ijerph18136945 |
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author | Chávez-Guevara, Isaac A. Hernández-Torres, Rosa P. Trejo-Trejo, Marina González-Rodríguez, Everardo Moreno-Brito, Verónica Wall-Medrano, Abraham Pérez-León, Jorge A. Ramos-Jiménez, Arnulfo |
author_facet | Chávez-Guevara, Isaac A. Hernández-Torres, Rosa P. Trejo-Trejo, Marina González-Rodríguez, Everardo Moreno-Brito, Verónica Wall-Medrano, Abraham Pérez-León, Jorge A. Ramos-Jiménez, Arnulfo |
author_sort | Chávez-Guevara, Isaac A. |
collection | PubMed |
description | Obesity is thought to be associated with a reduced capacity to increase fat oxidation in response to physical exercise; however, scientific evidence supporting this paradigm remains scarce. This study aimed to determine the interrelationship of different submaximal exercise metabolic flexibility (Metflex) markers and define its association with body fatness on subjects with obesity. Twenty-one male subjects with obesity performed a graded-intensity exercise protocol (Test 1) during which cardiorespiratory fitness (CRF), maximal fat oxidation (MFO) and its corresponding exercise intensity (FATmax) were recorded. A week afterward, each subject performed a 60-min walk (treadmill) at FATmax (Test 2), and the resulting fat oxidation area under the curve (TFO) and maximum respiratory exchange ratio (RER(peak)) were recorded. Blood lactate (LA(b)) levels was measured during both exercise protocols. Linear regression analysis was used to study the interrelationship of exercise Metflex markers. Pearson’s correlation was used to evaluate all possible linear relationships between Metflex and anthropometric measurement, controlling for CRF). The MFO explained 38% and 46% of RER(peak) and TFO’s associated variance (p < 0.01) while TFO and RER(peak) were inversely related (R(2) = 0.54, p < 0.01). Body fatness positively correlated with MFO (r = 0.64, p < 0.01) and TFO (r = 0.63, p < 0.01) but inversely related with RER(peak) (r = −0.67, p < 0.01). This study shows that MFO and RER(peak) are valid indicators of TFO during steady-state exercise at FATmax. The fat oxidation capacity is directly associated with body fatness in males with obesity. |
format | Online Article Text |
id | pubmed-8297250 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-82972502021-07-23 Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm Chávez-Guevara, Isaac A. Hernández-Torres, Rosa P. Trejo-Trejo, Marina González-Rodríguez, Everardo Moreno-Brito, Verónica Wall-Medrano, Abraham Pérez-León, Jorge A. Ramos-Jiménez, Arnulfo Int J Environ Res Public Health Article Obesity is thought to be associated with a reduced capacity to increase fat oxidation in response to physical exercise; however, scientific evidence supporting this paradigm remains scarce. This study aimed to determine the interrelationship of different submaximal exercise metabolic flexibility (Metflex) markers and define its association with body fatness on subjects with obesity. Twenty-one male subjects with obesity performed a graded-intensity exercise protocol (Test 1) during which cardiorespiratory fitness (CRF), maximal fat oxidation (MFO) and its corresponding exercise intensity (FATmax) were recorded. A week afterward, each subject performed a 60-min walk (treadmill) at FATmax (Test 2), and the resulting fat oxidation area under the curve (TFO) and maximum respiratory exchange ratio (RER(peak)) were recorded. Blood lactate (LA(b)) levels was measured during both exercise protocols. Linear regression analysis was used to study the interrelationship of exercise Metflex markers. Pearson’s correlation was used to evaluate all possible linear relationships between Metflex and anthropometric measurement, controlling for CRF). The MFO explained 38% and 46% of RER(peak) and TFO’s associated variance (p < 0.01) while TFO and RER(peak) were inversely related (R(2) = 0.54, p < 0.01). Body fatness positively correlated with MFO (r = 0.64, p < 0.01) and TFO (r = 0.63, p < 0.01) but inversely related with RER(peak) (r = −0.67, p < 0.01). This study shows that MFO and RER(peak) are valid indicators of TFO during steady-state exercise at FATmax. The fat oxidation capacity is directly associated with body fatness in males with obesity. MDPI 2021-06-29 /pmc/articles/PMC8297250/ /pubmed/34209545 http://dx.doi.org/10.3390/ijerph18136945 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Chávez-Guevara, Isaac A. Hernández-Torres, Rosa P. Trejo-Trejo, Marina González-Rodríguez, Everardo Moreno-Brito, Verónica Wall-Medrano, Abraham Pérez-León, Jorge A. Ramos-Jiménez, Arnulfo Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title | Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title_full | Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title_fullStr | Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title_full_unstemmed | Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title_short | Exercise Fat Oxidation Is Positively Associated with Body Fatness in Men with Obesity: Defying the Metabolic Flexibility Paradigm |
title_sort | exercise fat oxidation is positively associated with body fatness in men with obesity: defying the metabolic flexibility paradigm |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8297250/ https://www.ncbi.nlm.nih.gov/pubmed/34209545 http://dx.doi.org/10.3390/ijerph18136945 |
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