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Effects of intermittent versus continuous dieting on weight and body composition in obese and overweight people: a systematic review and meta-analysis of randomized controlled trials

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Authors
Roman, Yuani M.
Dominguez, Mariah C.
Easow, Tommy M.
Pasupuleti, Vinay
White, C. Michael
Hernandez, Adrian V.
Issue Date
2018
xmlui.metadata.dc.contributor.email
adrian.hernandez-diaz@uconn.edu

Metadata
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Publisher
Nature Publishing Group
Journal
International Journal of Obesity
URI
http://hdl.handle.net/10757/624649
DOI
10.1038/s41366-018-0204-0
Additional Links
http://www.nature.com/articles/s41366-018-0204-0
Abstract
Background: Intermittent dieting may be an alternative to continuous dieting for weight reduction. Objective: To evaluate the effect of intermittent dieting versus continuous dieting on weight and body composition in overweight or obese adults. Design: A systematic review and meta-analysis of randomized controlled trials (RCTs). Five databases were searched until February 2018 for RCTs comparing intermittent versus continuous dieting. Intermittent dieting consisted of two types: regular intermittent was caloric restriction interspersed with days of weight maintenance or ad libitum eating; intensified intermittent was caloric restriction interspersed with days of even lower caloric restriction. Continuous was continual caloric restriction. Primary outcomes were weight, body fat, lean mass, waist circumference, hip circumference, and energy expenditure. Data were pooled by the inverse variance method using random-effects models and expressed as mean differences (MD) and their 95% confidence intervals (CI). Results: Nine trials met the inclusion criteria (n = 782), six comparing regular intermittent vs continuous (n = 553), and three comparing intensified intermittent vs continuous (n = 229). Populations were heterogeneous: obese only in five studies, and overweight or obese (mixed) in four studies. Lean mass was significantly lower in regular intermittent vs continuous (MD −0.86 kg; 95% CI −1.62 to −0.10; p = 0.03). No differences were found for the remaining outcomes for both comparisons (regular intermittent or intensified intermittent vs continuous). There was low heterogeneity of effects across trials. Subgroup effects by time to follow-up, gender, per-protocol versus intention-to-treat, enforced exercise, and diabetes were similar to main analyses. Conclusions: This systematic review in obese and overweight individuals showed that regular intermittent dieting decreased lean mass compared to continuous dieting. There were no differences in effects for either intermittent vs continuous interventions across all other outcomes. In contrast to previous systematic reviews, this study suggested that lean mass is better preserved in continuous dieting compared to regular intermittent dieting.
Type
info:eu-repo/semantics/article
Rights
info:eu-repo/semantics/embargoedAccess
Language
eng
Description
El texto completo de este trabajo no está disponible en el Repositorio Académico UPC por restricciones de la casa editorial donde ha sido publicado.
ISSN
0307-0565
1476-5497
ae974a485f413a2113503eed53cd6c53
10.1038/s41366-018-0204-0
Scopus Count
Collections
Medicina

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