[Methodological description of accelerometry for measuring physical activity in the 1993 and 2004 Pelotas (Brazil) birth cohorts].

Abstract:

:The aim of this study was to characterize the methodology of data collection on physical activity using accelerometry in two birth cohorts (2004 and 1993) in Pelotas, Rio Grande do Sul State, Brazil, at the 6-7 and 18-year follow-up visits, respectively. During visits to the study headquarters for a health evaluation, cohort subjects received the accelerometer to be worn on the wrist for 5 to 8 days, after which the device was retrieved at their homes. Genea and GENEActiv triaxial estimators of gravity (g) acceleration were employed. Accelerometry data were collected from 3,331 children (93.7% of those included in follow-up) and 3,816 adolescents (99% of those in follow-up). The study characterizes the data collection methodology in more than 7,000 individuals and discusses issues in its implementation. It thus provides a methodological framework aimed at helping to plan future population-based studies with the use of such technology and to improve understanding of physical activity in the context of epidemiological studies.

journal_name

Cad Saude Publica

authors

Knuth AG,Assunção MC,Gonçalves H,Menezes AM,Santos IS,Barros AJ,Matijasevich A,Ramires VV,Silva IC,Hallal PC

doi

10.1590/s0102-311x2013000300013

subject

Has Abstract

pub_date

2013-03-01 00:00:00

pages

557-65

issue

3

eissn

0102-311X

issn

1678-4464

pii

S0102-311X2013000300013

journal_volume

29

pub_type

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