Purpose
To evaluate the multi-group and longitudinal invariance of ANNs to predict physical activity (PA) type and PA energy expenditure (METs) in youth.
Methods
The study was conducted at two sites. Site 1 (S1) served as the training and testing sample and comprised 100 youth mean age 11.0 ± 2.7 y. Site 2 (S2) served as ...
Purpose A number of recent studies have found associations between the characteristics of schoolyards and the level of PA of schoolchildren using the schoolyards. Based on these findings, it seems likely that making schoolyards more attractive will help to increase the total amount of PA among schoolchildren. Before starting our ...
Purpose
Evaluate the reliability and validity of a self-reported moderate-to-vigorous physical activity (MVPA) instrument administered by telephone and Internet.
Methods
The Active Australia Survey (AAS), administered nationally in Australia by telephone (T), was adapted into two forms for Internet self-administration: survey questions only (I-Text) and with videos demonstrating intensity (I-Video). ...
Purpose
Published experiences of using accelerometers in very young children are scarce. This study tested the usability of one accelerometer type, ActiGraph GT3X, in assessing free-living physical activity of 1.5 year-old Malawian children.
Methods
Fifty-two Malawian children [23 boys, mean age 17.0 months (range 16.0 – 18.5), mean HAZ -0.83, mean WHZ 0.08] from rural Lungwena ...
Purpose
To inform intervention development by investigating predictors of one-year change in objectively-measured intensity of physical activity (PA) in a cohort of 9-10 year old British school children.
Methods
In a cohort of 753 children in Norfolk (UK) (41.7% male, baseline age (mean±SD): 9.7±0.4 years) PA was measured over 3 or more days ...
Purpose
This study aimed to test the validity of the Global Physical Activity Questionnaire (GPAQ) against accelerometer data, as feasible, cost-effective instruments are required for the surveillance of physical activity (PA). The questionnaire has been previously assessed in terms of reproducibility and validity however, validation produced poor results and further ...
Purpose To compare associations between objective and subjective measures of moderate to vigorous physical activity (MVPA) & cardiometabolic biomarkers.
Methods 2174 (1110 boys) youth (12-19 years) from the 2003-6 NHANES combined surveys with self-reported MVPA (SRMVPA) in the previous 30 days & four 10-hour days of accelerometry MVPA (AMVPA) (Actigraph 7164) were included. The ...
Background
African American youth residing in the South are at high risk for obesity and physical inactivity. A growing body of evidence suggests that persons living in activity-friendly environments engage in more physical activity (PA); however, access of public recreational facilities varies by neighborhood and demographic characteristics. Additionally, historical and ...
Background
Changes in physical activity (PA) levels can be observed among youth. The majority of 11 year olds in Denmark do meet the recommend level of PA; the majority of 15 year olds do not. The chances of not meeting the recommended level of PA as adults are correlated with not meeting ...
Background
Hispanic-American preschool children have higher rates of obesity and Hispanic-American youth may be at higher risk for sedentary lifestyles and metabolic syndrome. Both physical and social environmental factors influence young children’s physical activity. The ability to simultaneously capture objective measurement of physical activity and location of young Hispanic-American ...