Background
Accelerometers measure levels of physical activity (PA) objectively, and they are being increasingly used to obtain information on PA in children.
Functional Data Analysis (FDA) is a statistical method that can be used to better characterise continuous activity patterns and their variation over time.
The objective of this study ...
Background/Aims
Proponents of the Daylight Saving Bill currently under consideration in the UK parliament have hypothesised that extending afternoon daylight would promote child physical activity. Our aim was to investigate the relative contribution of day length and weather to children's physical activity, and the behavioural mediators underlying these effects.
...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph’s ActiLife software.
Objective
Obesity rates in young children are increasing, and decreased physical activity is likely to be a major contributor to this trend. Studies ...
Background
Randomized controlled trials (RCT) are required to test relationships between physical activity and cognition in children, but these must be informed by exploratory studies. This study aimed to inform future RCT by: conducting practical utility and reliability studies to identify appropriate cognitive outcome measures; piloting an RCT of a 10 ...
Physical activity (PA) during childhood often occurs in social contexts. As such, children's ability to develop and maintain friendship groups may be important in understanding their PA.
This paper investigates the associations among children's social functioning, and physical activity and whether perceptions of social acceptance mediate any social functioning-PA association.
...
Purpose
This study evaluated the predictive validity of three previously published ActiGraph energy expenditure (EE) prediction equations developed for children and adolescents.
Methods
A total of 45 healthy children and adolescents (mean age: 13.7 +/- 2.6 yr) completed four 5-min activity trials (normal walking, brisk walking, easy running, and fast running) in an ...
Background Accurate objective assessment of sedentary and physical activity behaviours during childhood is integral to the understanding of their relation to later health outcomes, as well as to documenting the frequency and distribution of physical activity within a population.
Purpose To calibrate the Actigraph GT1M accelerometer, using energy expenditure (...
Background
Accurate objective assessment of sedentary and physical activity behaviours during childhood is integral to the understanding of their relation to later health outcomes, as well as to documenting the frequency and distribution of physical activity within a population.
Purpose
To calibrate the Actigraph GT1M accelerometer, using energy expenditure (...
Introduction
This study aimed to verify the effects of cardiorespiratory fitness levels over a set of cardiovascular risk factors, controlling for sex and physical activity (PA) of moderate (MPA), vigorous (VPA) and very vigorous (VVPA) intensities in children and adolescents.
Methods
Students aged 10-19 years (51 boys and 90 girls) completed measurements ...
Introduction
Sedentary behavior (SB) is directly associated with a greater risk of death from cardiovascular problems, cancer and all causes. Moreover, SB is directly associated with obesity in children. This study examined whether there was a significant seasonal variation in objectively measured SB in Portuguese youth across five months of ...