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Effects of a ketogenic diet on body composition and strength in trained women

BACKGROUND: The effect of ketogenic diets (KD) on body composition in different populations has been investigated. More recently, some have recommended that athletes adhere to ketogenic diets in order to optimize changes in body composition during training. However, there is less evidence related to...

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Autores principales: Vargas-Molina, Salvador, Petro, Jorge L., Romance, Ramón, Kreider, Richard B., Schoenfeld, Brad J., Bonilla, Diego A., Benítez-Porres, Javier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7146906/
https://www.ncbi.nlm.nih.gov/pubmed/32276630
http://dx.doi.org/10.1186/s12970-020-00348-7
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author Vargas-Molina, Salvador
Petro, Jorge L.
Romance, Ramón
Kreider, Richard B.
Schoenfeld, Brad J.
Bonilla, Diego A.
Benítez-Porres, Javier
author_facet Vargas-Molina, Salvador
Petro, Jorge L.
Romance, Ramón
Kreider, Richard B.
Schoenfeld, Brad J.
Bonilla, Diego A.
Benítez-Porres, Javier
author_sort Vargas-Molina, Salvador
collection PubMed
description BACKGROUND: The effect of ketogenic diets (KD) on body composition in different populations has been investigated. More recently, some have recommended that athletes adhere to ketogenic diets in order to optimize changes in body composition during training. However, there is less evidence related to trained women. We aimed to evaluate the effect of a KD on body composition and strength in trained women following an eight-week resistance training (RT) program. METHODS: Twenty-one strength-trained women (27.6 ± 4.0 years; 162.1 ± 6.6 cm; 62.3 ± 7.8 kg; 23.7 ± 2.9 kg·m(− 2)) were randomly assigned to either a non-KD group (n = 11, NKD) or a KD group (n = 10, KD). Study outcomes included body composition as measured by dual-energy X-ray absorptiometry (DXA), strength levels measured using one maximum repetition (RM) in back squat and bench press (BP), and countermovement jump (CMJ) measured on a force plate. RESULTS: A significant reduction in fat mass was observed in KD (− 1.1 ± 1.5 kg; P = 0.042; d = − 0.2) but not in NDK (0.3 ± 0.8 kg; P = 0.225; d = 0.1). No significant changes in fat-free mass were observed in KD (− 0.7 ± 1.7 kg; P = 0.202; d = − 0.1) or NKD (0.7 ± 1.1 kg; P = 0.074; d = 0.2), but absolute changes favored NKD. No significant changes in BP were observed in KD (1.5 ± 4.6 kg; P = 0.329; d = 0.2), although significant changes were noted in the squat and CMJ (5.6 ± 7.6 kg; P = 0.045; d = 0.5 and 2.2 ± 1.7 kg; P = 0.022; d = 0.6, respectively). In contrast, NKD showed significant increases in BP (4.8 ± 1.8; P < 0.01; d = 0.7), squat (15.6 ± 5.4 kg; P = 0.005; d = 1.4) and CMJ (22.0 + 4.2 cm; P = 0.001; d = 0.5). CONCLUSIONS: Findings indicate that a KD may help to decrease fat mass and maintain fat-free mass after eight 8 weeks of RT in trained-women but is suboptimal for increasing fat-free mass.
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spelling pubmed-71469062020-04-18 Effects of a ketogenic diet on body composition and strength in trained women Vargas-Molina, Salvador Petro, Jorge L. Romance, Ramón Kreider, Richard B. Schoenfeld, Brad J. Bonilla, Diego A. Benítez-Porres, Javier J Int Soc Sports Nutr Research Article BACKGROUND: The effect of ketogenic diets (KD) on body composition in different populations has been investigated. More recently, some have recommended that athletes adhere to ketogenic diets in order to optimize changes in body composition during training. However, there is less evidence related to trained women. We aimed to evaluate the effect of a KD on body composition and strength in trained women following an eight-week resistance training (RT) program. METHODS: Twenty-one strength-trained women (27.6 ± 4.0 years; 162.1 ± 6.6 cm; 62.3 ± 7.8 kg; 23.7 ± 2.9 kg·m(− 2)) were randomly assigned to either a non-KD group (n = 11, NKD) or a KD group (n = 10, KD). Study outcomes included body composition as measured by dual-energy X-ray absorptiometry (DXA), strength levels measured using one maximum repetition (RM) in back squat and bench press (BP), and countermovement jump (CMJ) measured on a force plate. RESULTS: A significant reduction in fat mass was observed in KD (− 1.1 ± 1.5 kg; P = 0.042; d = − 0.2) but not in NDK (0.3 ± 0.8 kg; P = 0.225; d = 0.1). No significant changes in fat-free mass were observed in KD (− 0.7 ± 1.7 kg; P = 0.202; d = − 0.1) or NKD (0.7 ± 1.1 kg; P = 0.074; d = 0.2), but absolute changes favored NKD. No significant changes in BP were observed in KD (1.5 ± 4.6 kg; P = 0.329; d = 0.2), although significant changes were noted in the squat and CMJ (5.6 ± 7.6 kg; P = 0.045; d = 0.5 and 2.2 ± 1.7 kg; P = 0.022; d = 0.6, respectively). In contrast, NKD showed significant increases in BP (4.8 ± 1.8; P < 0.01; d = 0.7), squat (15.6 ± 5.4 kg; P = 0.005; d = 1.4) and CMJ (22.0 + 4.2 cm; P = 0.001; d = 0.5). CONCLUSIONS: Findings indicate that a KD may help to decrease fat mass and maintain fat-free mass after eight 8 weeks of RT in trained-women but is suboptimal for increasing fat-free mass. BioMed Central 2020-04-10 /pmc/articles/PMC7146906/ /pubmed/32276630 http://dx.doi.org/10.1186/s12970-020-00348-7 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Vargas-Molina, Salvador
Petro, Jorge L.
Romance, Ramón
Kreider, Richard B.
Schoenfeld, Brad J.
Bonilla, Diego A.
Benítez-Porres, Javier
Effects of a ketogenic diet on body composition and strength in trained women
title Effects of a ketogenic diet on body composition and strength in trained women
title_full Effects of a ketogenic diet on body composition and strength in trained women
title_fullStr Effects of a ketogenic diet on body composition and strength in trained women
title_full_unstemmed Effects of a ketogenic diet on body composition and strength in trained women
title_short Effects of a ketogenic diet on body composition and strength in trained women
title_sort effects of a ketogenic diet on body composition and strength in trained women
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7146906/
https://www.ncbi.nlm.nih.gov/pubmed/32276630
http://dx.doi.org/10.1186/s12970-020-00348-7
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