Physical Activity and Weight in Children Aged 8-9
Author Information
Author(s): Lisa R Purslow, Claire Hill, Jenny Saxton, Kirsten Corder, Jane Wardle
Primary Institution: University College London
Hypothesis
The study aims to assess associations between physical activity and sedentary time across the weight spectrum in children, and to determine whether these associations differ by sex.
Conclusion
In boys, physical activity decreases with increasing weight, while girls show consistently low levels of physical activity across all weight categories.
Supporting Evidence
- Boys had higher total activity and more minutes of moderate and vigorous physical activity than girls.
- 72% of boys met physical activity guidelines compared to 30% of girls.
- In boys, weight status significantly predicted total activity and MVPA, but not in girls.
Takeaway
Boys who are heavier tend to be less active, but girls are generally not very active regardless of their weight.
Methodology
The study involved 345 children aged 8-9 years, measuring their height, weight, waist circumference, and physical activity using an accelerometer over 5 days.
Potential Biases
Potential measurement error from accelerometer data may underestimate physical activity levels.
Limitations
The cross-sectional nature of the study limits causal inferences, and accelerometers may not capture all types of physical activity.
Participant Demographics
Participants included 176 boys and 169 girls aged 8-9 years from diverse socioeconomic backgrounds.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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