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Evaluation of Actiheart and a 7 d activity diary for estimating free-living total and activity energy expenditure using criterion methods in 1·5- and 3-year-old children

Author:
Henriksson, Hanna, Forsum, Elisabet, Löf, Marie
Source:
The British journal of nutrition 2014 v.111 no.10 pp. 1830-1840
ISSN:
1475-2662
Subject:
calorimetry, children, energy expenditure, heart rate, lean body mass, normal values, physical activity
Abstract:
Accurate and easy-to-use methods to assess free-living energy expenditure in response to physical activity in young children are scarce. In the present study, we evaluated the capacity of (1) 4 d recordings obtained using the Actiheart (mean heart rate (mHR) and mean activity counts (mAC)) to provide assessments of total energy expenditure (TEE) and activity energy expenditure (AEE) and (2) a 7 d activity diary to provide assessments of physical activity levels (PAL) using three sets of metabolic equivalent (MET) values (PALTₒᵣᵤₙ, PALAdₒₗₚₕ and PALAᵢₙₛwₒᵣₜₕ) in forty-four and thirty-one healthy Swedish children aged 1·5 and 3 years, respectively. Reference TEE, PALᵣₑf and AEE were measured using criterion methods, i.e. the doubly labelled water method and indirect calorimetry. At 1·5 years of age, mHR explained 8 % (P= 0·006) of the variation in TEE above that explained by fat mass and fat-free mass. At 3 years of age, mHR and mAC explained 8 (P= 0·004) and 6 (P= 0·03) % of the variation in TEE and AEE, respectively, above that explained by fat mass and fat-free mass. At 1·5 and 3 years of age, average PALAᵢₙₛwₒᵣₜₕ values were 1·44 and 1·59, respectively, and not significantly different from PALᵣₑf values (1·39 and 1·61, respectively). By contrast, average PALTₒᵣᵤₙ (1·5 and 3 years) and PALAdₒₗₚₕ (3 years) values were lower (P< 0·05) than the corresponding PALᵣₑf values. In conclusion, at both ages, Actiheart recordings explained a small but significant fraction of free-living energy expenditure above that explained by body composition variables, and our activity diary produced mean PAL values in agreement with reference values when using MET values published by Ainsworth.
Agid:
5162931