The measurement of sedentary patterns and behaviors using the activPAL™ Professional physical activity monitor.

Abstract:

:Epidemiological studies have associated the negative effects of sedentary time and sedentary patterns on health indices. However, these studies have used methodologies that do not directly measure the sedentary state. Recent technological developments in the area of motion sensors have incorporated inclinometers, which can measure the inclination of the body directly, without relying on self-report or count thresholds. This paper aims to provide a detailed description of methodologies used to examine a range of relevant variables, including sedentary levels and patterns from an inclinometer-based motion sensor. The activPAL Professional physical activity logger provides an output which can be interpreted and used without the need for further processing and additional variables were derived using a custom designed MATLAB® computer program. The methodologies described have been implemented on a sample of 44 adolescent females, and the results of a range of daily physical activity and sedentary variables are described and presented. The results provide a range of objectively measured and objectively processed variables, including total time spent sitting/lying, standing and stepping, number and duration of daily sedentary bouts and both bed hours and non-bed hours, which may be of interest when making association between physical activity, sedentary behaviors and health indices.

journal_name

Physiol Meas

authors

Dowd KP,Harrington DM,Bourke AK,Nelson J,Donnelly AE

doi

10.1088/0967-3334/33/11/1887

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

1887-99

issue

11

eissn

0967-3334

issn

1361-6579

journal_volume

33

pub_type

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