Background: Different approaches to measuring physical activity
and fatness in youth have resulted in studies reporting
relationships ranging from very strong to non-existent. Methods:
The sample comprised 787 males and 752 females aged between 7
and 16 years. Pedometer-determined physical activity, height,
weight and waist girth measures were taken. Results: Significant
differences were found in activity level between BMI-determined
weight categories for the females (F(1, 742) = 9.07, p = .003)
but not for the males (F(1, 777) = 3.59, p = .06) and between
truncal adiposity groupings for both the males (F(1, 777) =
4.69, p = .03) and the females (F(1, 742) = 13.56, p = .000).
Conclusions: The relationship between physical activity and body
fatness differs according to the measure used and between males
and females. Factors contributing to body fatness such as eating
behaviours or sedentary activities may be more important among
boys than girls. Hands, B. P., & Parker, H. (2008). Pedometer-
determined physical