Purpose To study the mica- and inter-instrument reliability and validity of the Computer Science & Applications (CSA) Model 7164 accelerometer, along with the nature of the analogue filter in the device with sinusoidal movements in a mechanical setting. Methods Six CSA units were tested with 17 different frequencies (0.5-4Hz) on three ...
Purpose Heart rate (HR) and motion sensors represent promising tools for physical activity (PA) assessment, as each provides an estimate of energy expenditure (EE). Although each has inherent limitations, the simultaneous use of HR and motion sensors may increase the accuracy of EE estimates. The primary purpose of this study ...
The purpose of the present study was to systematically review published evidence on the reproducibility, validity, and feasibility of motion sensors used to assess physical activity in healthy children and adolescents (2-18 yr). Method A systematic literature search was performed in October 2004 in PubMed, Embase, and SpycINFO. The clinimetric quality ...
This study examined whether there was a significant seasonal variation in objectively measured habitual physical activity and sedentary behavior in young children. Participants were 209 children who attend nursery in Glasgow, Scotland, and measurements were taken using uniaxial accelerometry over 3 to 6 days. There were small but significant seasonal associations with physical ...
Background Physical activity (PA) is relevant to the prevention and management of many health conditions in family practice. There is a need for an efficient, reliable, and valid assessment tool to identify patients in need of PA interventions. Methods Twenty-eight family physicians in three Australian cities assessed the PA of ...
A study in the Dec.1 issue of the journal Sleep suggests that changes in children’s sleep patterns that typically occur between the ages of 11 and 12 years are evident before the physical changes associated with the onset of puberty. Results show that over the two-year course of the study, sleep ...
Extensive evidence supports the benefits of physical activity on health outcomes. Adolescence is often viewed as an important period of acquisition and maintenance of health behaviours. It is also assumed that physical activity habits do not occur in a social vacuum. This study examines the sociogeographic variation in a sample ...
The Computer Science Application (CSA) accelerometer uses integrated circuitry and memory to provide a continuous recording of minute-by-minute movement counts. It has been previously validated as an objective monitor of children's physical activity in field and laboratory settings. Our purpose was to derive accelerometry summary variables reflective of different physical ...
Purpose To evaluate the technical performance of the CSA accelerometer-based activity monitor. Methods Twenty-three CSA monitors were subjected to intra- and inter-instrument variability tests by controlled trials using a motorized turntable. The CSA monitor measures change in acceleration, and precision was tested by producing sinusoidal variations in speed around two ...
Introduction Since low levels of PA may predispose children to obesity in later life, it is important to monitor and promote PA beginning as early as in preschool age. However, PA data in preschoolers are still limited. The present study aimed at investigating the effects of a structured PA session, ...