Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training

Purpose: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Methods: We searched English-language...

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Autores principales:	James Steele, Daniel Plotkin, Derrick Van Every, Avery Rosa, Hugo Zambrano, Benjiman Mendelovits, Mariella Carrasquillo-Mercado, Jozo Grgic, Brad J. Schoenfeld
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	intensity of effort fat loss fat mass body fat lean mass Sports GV557-1198.995
Acceso en línea:	https://doaj.org/article/1566c5808028472e810144331db114af
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spelling	oai:doaj.org-article:1566c5808028472e810144331db114af2021-11-25T19:00:07ZSlow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training10.3390/sports91101552075-4663https://doaj.org/article/1566c5808028472e810144331db114af2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4663/9/11/155https://doaj.org/toc/2075-4663Purpose: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Methods: We searched English-language papers on PubMed/MEDLINE, Scopus, CINAHL, and sportrxiv for the following inclusion criteria: (a) randomized controlled trials that directly compared IT vs MICT body composition using a validated measure in healthy children and adults; (b) training was carried out a minimum of once per week for at least four weeks; (c) published in a peer-reviewed English language journal or on a pre-print server. Results: The main model for fat mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with moderate heterogeneity (−0.016 (95%CI −0.07 to 0.04); <i>I</i><sup>2</sup> = 36%). The main model for fat-free mass (FFM) effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity (−0.0004 (95%CI −0.05 to 0.05); <i>I</i><sup>2</sup> = 16%). The GRADE summary of findings suggested high certainty for both main model effects. Conclusions: Our findings provide compelling evidence that the pattern of intensity of effort and volume during endurance exercise (i.e., IT vs MICT) has minimal influence on longitudinal changes in fat mass and FFM, which are likely to minimal anyway. Trial registration number: This study was preregistered on the Open Science Framework.James SteeleDaniel PlotkinDerrick Van EveryAvery RosaHugo ZambranoBenjiman MendelovitsMariella Carrasquillo-MercadoJozo GrgicBrad J. SchoenfeldMDPI AGarticleintensity of effortfat lossfat massbody fatlean massSportsGV557-1198.995ENSports, Vol 9, Iss 155, p 155 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	intensity of effort fat loss fat mass body fat lean mass Sports GV557-1198.995
spellingShingle	intensity of effort fat loss fat mass body fat lean mass Sports GV557-1198.995 James Steele Daniel Plotkin Derrick Van Every Avery Rosa Hugo Zambrano Benjiman Mendelovits Mariella Carrasquillo-Mercado Jozo Grgic Brad J. Schoenfeld Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
description	Purpose: To conduct a systematic review and multilevel meta-analysis of the current literature as to the effects of interval training (IT) vs moderate intensity continuous training (MICT) on measures of body composition, both on a whole-body and regional level. Methods: We searched English-language papers on PubMed/MEDLINE, Scopus, CINAHL, and sportrxiv for the following inclusion criteria: (a) randomized controlled trials that directly compared IT vs MICT body composition using a validated measure in healthy children and adults; (b) training was carried out a minimum of once per week for at least four weeks; (c) published in a peer-reviewed English language journal or on a pre-print server. Results: The main model for fat mass effects revealed a trivial standardized point estimate with high precision for the interval estimate, with moderate heterogeneity (−0.016 (95%CI −0.07 to 0.04); <i>I</i><sup>2</sup> = 36%). The main model for fat-free mass (FFM) effects revealed a trivial standardized point estimate with high precision for the interval estimate, with negligible heterogeneity (−0.0004 (95%CI −0.05 to 0.05); <i>I</i><sup>2</sup> = 16%). The GRADE summary of findings suggested high certainty for both main model effects. Conclusions: Our findings provide compelling evidence that the pattern of intensity of effort and volume during endurance exercise (i.e., IT vs MICT) has minimal influence on longitudinal changes in fat mass and FFM, which are likely to minimal anyway. Trial registration number: This study was preregistered on the Open Science Framework.
format	article
author	James Steele Daniel Plotkin Derrick Van Every Avery Rosa Hugo Zambrano Benjiman Mendelovits Mariella Carrasquillo-Mercado Jozo Grgic Brad J. Schoenfeld
author_facet	James Steele Daniel Plotkin Derrick Van Every Avery Rosa Hugo Zambrano Benjiman Mendelovits Mariella Carrasquillo-Mercado Jozo Grgic Brad J. Schoenfeld
author_sort	James Steele
title	Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
title_short	Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
title_full	Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
title_fullStr	Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
title_full_unstemmed	Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training
title_sort	slow and steady, or hard and fast? a systematic review and meta-analysis of studies comparing body composition changes between interval training and moderate intensity continuous training
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1566c5808028472e810144331db114af
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Slow and Steady, or Hard and Fast? A Systematic Review and Meta-Analysis of Studies Comparing Body Composition Changes between Interval Training and Moderate Intensity Continuous Training

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