The physical behaviour intensity spectrum and body mass index in school-aged youth: A compositional analysis of pooled individual participant data

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15510%2F22%3A73613293" target="_blank" >RIV/61989592:15510/22:73613293 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1660-4601/19/14/8778/htm" target="_blank" >https://www.mdpi.com/1660-4601/19/14/8778/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ijerph19148778" target="_blank" >10.3390/ijerph19148778</a>

Result language

angličtina

Original language name

The physical behaviour intensity spectrum and body mass index in school-aged youth: A compositional analysis of pooled individual participant data

Original language description

We examined the compositional associations between the intensity spectrum derived from incremental acceleration intensity bands and the body mass index (BMI) z-score in youth, and investigated the estimated differences in BMI z-score following time reallocations between intensity bands. School-aged youth from 63 schools wore wrist accelerometers, and data of 1453 participants (57.5% girls) were analysed. Nine acceleration intensity bands (range: 0–50 mg to ≥700 mg) were used to generate time-use compositions. Multivariate regression assessed the associations between intensity band compositions and BMI z-scores. Compositional isotemporal substitution estimated the differences in BMI z-score following time reallocations between intensity bands. The ≥700 mg intensity bandwas strongly and inversely associated with BMI z-score (p &lt; 0.001). The estimated differences in BMI z-score when 5 min were reallocated to and from the ≥700 mg band and reallocated equally among the remaining bands were −0.28 and 0.44, respectively (boys), and −0.39 and 1.06, respectively (girls). The time in the ≥700 mg intensity band was significantly associated with BMI z-score, irrespective of sex. When even modest durations of time in this band were reallocated, the asymmetrical estimated differences in BMI z-score were clinically meaningful. The findings highlight the utility of the full physical activity intensity spectrum over a priori-determined absolute intensity cut-point approaches.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30304 - Public and environmental health

Project

<a href="/en/project/GA22-02392S" target="_blank" >GA22-02392S: Optimizing the 24-h movement behaviors for obesity prevention in the post-pandemic era</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Environmental Research and Public Health

ISSN

1660-4601

e-ISSN

—

Volume of the periodical

19

Issue of the periodical within the volume

14

Country of publishing house

CH - SWITZERLAND

Number of pages

15

Pages from-to

1-15

UT code for WoS article

000832470200001

EID of the result in the Scopus database

2-s2.0-85135116094