Publication:
Energy expenditure and macronutrient oxidation in response to an individualized nonshivering cooling protocol

Date

2020

Authors

Sánchez Delgado, Guillermo
Acosta, Francisco M.
Martínez Téllez, Borja
Amaro Gahete, Francisco J.
Merchán Ramírez, Elisa
Löf, M.
Ravussin, Eric
Ruiz, Jonatan R.

Director

Publisher

Wiley
Acceso abierto / Sarbide irekia
Artículo / Artikulua
Versión aceptada / Onetsi den bertsioa

Project identifier

MINECO//PI13%2F01393/ES/recolecta
ES/1PE/DEP2016-79512-R
MECD//FPU13%2F04365/ES/recolecta
MECD//FPU14%2F04172/ES/recolecta
MECD//FPU15%2F04059/ES/recolecta

Abstract

Objective This study aimed to describe the energy expenditure (EE) and macronutrient oxidation response to an individualized nonshivering cold exposure in young healthy adults. Methods Two different groups of 44 (study 1: 22.1 [SD 2.1] years old, 25.6 [SD 5.2] kg/m(2), 34% men) and 13 young healthy adults (study 2: 25.6 [SD 3.0] years old, 23.6 [SD 2.4] kg/m(2), 54% men) participated in this study. Resting metabolic rate (RMR) and macronutrient oxidation rates were measured by indirect calorimetry under fasting conditions in a warm environment (for 30 minutes) and in mild cold conditions (for 65 minutes, with the individual wearing a water-perfused cooling vest set at an individualized temperature adjusted to the individual's shivering threshold). Results In study 1, EE increased in the initial stage of cold exposure and remained stable for the whole cold exposure (P < 0.001). Mean cold-induced thermogenesis (9.56 +/- 7.9 kcal/h) was 13.9% +/- 11.6% of the RMR (range: -14.8% to 39.9% of the RMR). Carbohydrate oxidation decreased during the first 30 minutes of the cold exposure and later recovered up to the baseline values (P < 0.01) in parallel to opposite changes in fat oxidation (P < 0.01). Results were replicated in study 2. Conclusions A 1-hour mild cold exposure individually adjusted to elicit maximum nonshivering thermogenesis induces a very modest increase in EE and a shift of macronutrient oxidation that may underlie a shift in thermogenic tissue activity.

Description

Keywords

Energy expenditure, Macronutrient oxidation, Nonshivering threshold, Cold tolerance, Nonshivering thermogenesis

Department

Institute on Innovation and Sustainable Development in Food Chain - ISFOOD

Faculty/School

Degree

Doctorate program

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© 2020 The Obesity Society

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