Dados do Trabalho

Título

EFFECTS OF AN 8-HOUR RESTRICTED EATING INTERVENTION ON SLEEP AND BODY COMPOSITION IN OBESE ADULTS: A PILOT STUDY

Introdução

Time Restricted Eating (TRE) is a type of intermittent fasting considered a viable alternative for obesity treatment. Its effects on body composition and sleep quality remain controversial.

Objetivo

The aim of this study was to assess the effects of an 8-hour TRA intervention on weight loss, body composition and sleep in obese adults.

Métodos

A randomized clinical trial was carried out, approved by the Human Research Ethics Committee at the Federal University of Lavras (6.207.765). Participants between 30 and 65 years, with a Body Mass Index (BMI) equal or greater than 30kg/m², of both sexes and an eating window between 11 and 14 hours were included. 30 participants were randomized into a 12 weeks 8-hour TRE intervention group (TRE- meals between 11am and 7pm) or control group (CON; eating window > 10 hours and nutritional guidance). Body weight, height, waist and neck circumference and body composition (electrical bioimpedance) were assessed. Sleep quality was assessed using the Biologix® digital finger oximeter and the Pittsburgh Sleep Quality Index (PSQI) and the somnolence was assessed by the Epworth sleepiness scale (ESS). Adherence to the intervention was measured using an adherence diary. Analysis of variance was applied to assess the differences between the groups.

Resultados

20 participants completed the study (9 TRE and 11 CON). The mean age of the sample was 43.75 ± 8.74 years, being 50% males. A difference was observed for weight (105,2±13,97 to 101,65±12,85kg, p= 0.022), BMI (35,73±3,25 to 34,53±2,74 kg/m2; p= 0.023), waist circumference (117,42±11,97 to 112,26±11,68cm, p=0,006) only in the TRE group. There was no difference between the groups for the sleep variables. Adherence to the intervention in the 8-hour TRA group was 65.81± 25.85%, equivalent to adherence 4.6 days a week.

Conclusões

A four days a week of 8 hours restricting eating during three months resulted in reduction in body weight and improvements in anthropometric parameters in obese adults, without differences in sleep parameters and not in relation to the control group.

Palavras -chave

obesity; time restricted eating; sleep; body composition.