The effect of weather conditions and psycho-social measures on daily physical activity in adolescents
ISPAH ePoster Library. van Woudenberg T. Oct 16, 2018; 225085; 510
Thabo van Woudenberg
Thabo van Woudenberg
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Abstract IntroductionThe current study examined the effect of the weather on daily physical activity in adolescents, and extends the literature by adding psycho-social determinants of the theory of planned behavior (TPB) to the analysis.MethodDutch adolescents (N=846, 9-15 y/o) participated for four separate weeks between January 2015 and March 2016 in the MyMovez project. Daily minutes of MVPA were measured by means of accelerometer (Fitbit Flex) and questionnaires were sent via a research smartphone. Daily weather measurements were collected from the website of the Royal Dutch Meteorological Institute. In total 120 unique dates were included in the study.ResultsBecause participants were nested within schools and classes, and participants provided multiple months and days of physical activity data, mixed models were used to control for clustering of the data within schools, classes, participants, month and days. A linear mixed-effects model, using the lme4 package in R, was used to test the effect of the weather conditions on daily physical activity. After controlling for gender, age, and BMI, the model showed that daily minutes of MVPA was predicted by mean temperature, hours of sunshine, hours of precipitation. After adding the psycho-social determinants (i.e. attitude, perceived norms, self-efficacy and intentions), only the hours of sunshine per day remains a significant predictor of daily minutes of MVPA.ConclusionIn the literature, several weather conditions are designated as predictors of physical activity. However, when controlled for psychosocial measures, only hours of sunshine appear to be a predictor of daily minutes of MVPA.
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