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Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise

BACKGROUND: The purpose of this study was to examine whether very short duration, very high intensity sprint interval training (SIT) leads to loss of body fat mass in association with improvements to VO(2)max and fatty acid oxidation, and to assess the extent of sex dimorphism in these physiological...

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Autores principales: Bagley, Liam, Slevin, Mark, Bradburn, Steven, Liu, Donghui, Murgatroyd, Chris, Morrissey, George, Carroll, Michael, Piasecki, Mathew, Gilmore, William S, McPhee, Jamie S
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BMJ Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5117024/
https://www.ncbi.nlm.nih.gov/pubmed/27900150
http://dx.doi.org/10.1136/bmjsem-2015-000056
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author Bagley, Liam
Slevin, Mark
Bradburn, Steven
Liu, Donghui
Murgatroyd, Chris
Morrissey, George
Carroll, Michael
Piasecki, Mathew
Gilmore, William S
McPhee, Jamie S
author_facet Bagley, Liam
Slevin, Mark
Bradburn, Steven
Liu, Donghui
Murgatroyd, Chris
Morrissey, George
Carroll, Michael
Piasecki, Mathew
Gilmore, William S
McPhee, Jamie S
author_sort Bagley, Liam
collection PubMed
description BACKGROUND: The purpose of this study was to examine whether very short duration, very high intensity sprint interval training (SIT) leads to loss of body fat mass in association with improvements to VO(2)max and fatty acid oxidation, and to assess the extent of sex dimorphism in these physiological responses. METHODS: A total of 24 men and 17 women (mean (SEM) age: 39 (±2) years; body mass index 24.6 (0.6)) completed measurements of the maximal rate of oxygen uptake (VO(2)max) and fatty acid oxidation (FATmax). Body fat and lean mass were measured by dual emission x-ray absorptiometry, and fasting blood lipid, glucose and insulin profiles were assessed before and after training. SIT consisted of 4×20 s sprints on a cycle ergometer at approximately 175% VO(2)max, three times per week for 12 weeks. RESULTS: Fat mass decreased by 1.0 kg, although men lost statistically significantly more fat than women both when expressed in Kg and as % body fat. VO(2)max increased by around 9%, but women improved VO(2)max significantly more than men. FATmax improved by around 13%, but fasting plasma glucose, insulin, total triglyceride, total cholesterol and high-density lipoprotein (HDL) did not change after training, while low-density lipoprotein decreased by 8% (p=0.028) and the HDL:Total Cholesterol ratio improved by 6%. There were no sex differences in these metabolic responses to training. CONCLUSIONS: These results show lower body fat %, and higher rates of fatty acid oxidation and VO(2)max after 12 weeks of training for just 4 min per week. Notably, women improved VO(2)max more than men, while men lost more fat than women.
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spelling pubmed-51170242016-11-29 Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise Bagley, Liam Slevin, Mark Bradburn, Steven Liu, Donghui Murgatroyd, Chris Morrissey, George Carroll, Michael Piasecki, Mathew Gilmore, William S McPhee, Jamie S BMJ Open Sport Exerc Med Research BACKGROUND: The purpose of this study was to examine whether very short duration, very high intensity sprint interval training (SIT) leads to loss of body fat mass in association with improvements to VO(2)max and fatty acid oxidation, and to assess the extent of sex dimorphism in these physiological responses. METHODS: A total of 24 men and 17 women (mean (SEM) age: 39 (±2) years; body mass index 24.6 (0.6)) completed measurements of the maximal rate of oxygen uptake (VO(2)max) and fatty acid oxidation (FATmax). Body fat and lean mass were measured by dual emission x-ray absorptiometry, and fasting blood lipid, glucose and insulin profiles were assessed before and after training. SIT consisted of 4×20 s sprints on a cycle ergometer at approximately 175% VO(2)max, three times per week for 12 weeks. RESULTS: Fat mass decreased by 1.0 kg, although men lost statistically significantly more fat than women both when expressed in Kg and as % body fat. VO(2)max increased by around 9%, but women improved VO(2)max significantly more than men. FATmax improved by around 13%, but fasting plasma glucose, insulin, total triglyceride, total cholesterol and high-density lipoprotein (HDL) did not change after training, while low-density lipoprotein decreased by 8% (p=0.028) and the HDL:Total Cholesterol ratio improved by 6%. There were no sex differences in these metabolic responses to training. CONCLUSIONS: These results show lower body fat %, and higher rates of fatty acid oxidation and VO(2)max after 12 weeks of training for just 4 min per week. Notably, women improved VO(2)max more than men, while men lost more fat than women. BMJ Publishing Group 2016-03-04 /pmc/articles/PMC5117024/ /pubmed/27900150 http://dx.doi.org/10.1136/bmjsem-2015-000056 Text en Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/ This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
spellingShingle Research
Bagley, Liam
Slevin, Mark
Bradburn, Steven
Liu, Donghui
Murgatroyd, Chris
Morrissey, George
Carroll, Michael
Piasecki, Mathew
Gilmore, William S
McPhee, Jamie S
Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title_full Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title_fullStr Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title_full_unstemmed Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title_short Sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and VO(2)max during exercise
title_sort sex differences in the effects of 12 weeks sprint interval training on body fat mass and the rates of fatty acid oxidation and vo(2)max during exercise
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5117024/
https://www.ncbi.nlm.nih.gov/pubmed/27900150
http://dx.doi.org/10.1136/bmjsem-2015-000056
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