Accelerometer compared with questionnaire measures of physical activity in relation to body size and composition: a large cross-sectional analysis of UK Biobank.

ABSTRACT:

Objectives

Previous studies of the association between physical activity and adiposity are largely based on physical activity and body mass index (BMI) from questionnaires, which are prone to inaccurate and biased reporting. We assessed the associations of accelerometer-measured and questionnaire-measured physical activity with BMI, waist circumference and body fat per cent measured by bioelectrical impedance and dual-energy X-ray absorptiometry (DXA).

Design

Cross-sectional analysis of UK Biobank participants.

Setting

UK Biobank assessment centres.

Participants

78 947 UK Biobank participants (35 955 men and 42 992 women) aged 40-70 at recruitment, who had physical activity measured by both questionnaire and accelerometer.

Main outcome measures

BMI, wais

SUBMITTER: Guo W 

PROVIDER: S-EPMC6352868 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature