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Who will increase their physical activity? Predictors of change in objectively measured physical activity over 12 months in the ProActive cohort.

Abstract：

BACKGROUND:The aim was to identify predictors of change in objectively measured physical activity over 12 months in the ProActive cohort to improve understanding of factors influencing change in physical activity. METHODS:ProActive is a physical activity promotion trial that took place in Eastern England (1999-2004). 365 offspring of people with type 2 diabetes underwent measurement of physical activity energy expenditure (PAEE) using heart rate monitoring, fitness, and anthropometric and biochemical status at baseline and 1 year (n = 321). Linear regression was used to quantify the associations between baseline demographic, clinical, psychosocial and behavioural variables and change in PAEE over 12 months. This study is registered as ISRCTN61323766. RESULTS:ProActive participants significantly increased their PAEE by 0.6 kj/min (SD 4.2, p = 0.006) over one year, the equivalent of around 20 minutes brisk walking/day. Male sex and higher fitness at baseline predicted increase in PAEE. No significant associations were found for any other variables. Very few baseline demographic, clinical, psychosocial and behavioural predictors were associated with change in objectively measured physical activity. CONCLUSIONS:Traditional baseline determinants of self-reported physical activity targeted by behavioural interventions may be relatively weak predictors of change in objectively measured physical activity. Further research is needed to improve our understanding of factors influencing change in physical activity to inform the development and targeting of interventions.

journal_name

BMC Public Health

journal_title

BMC public health

authors

Simmons RK,van Sluijs EM,Hardeman W,Sutton S,Griffin SJ,ProActive project team.

doi

10.1186/1471-2458-10-226

subject

Has Abstract

pub_date

2010-04-30 00:00:00

pages

226

issn

1471-2458

pii

1471-2458-10-226

journal_volume

10

pub_type

杂志文章,随机对照试验

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