Convergent validity of ActiGraph and Actical accelerometers for estimating physical activity in adults.

ABSTRACT:

Purpose

The aim of the present study was to examine the convergent validity of two commonly-used accelerometers for estimating time spent in various physical activity intensities in adults.

Methods

The sample comprised 37 adults (26 males) with a mean (SD) age of 37.6 (12.2) years from San Diego, USA. Participants wore ActiGraph GT3X+ and Actical accelerometers for three consecutive days. Percent agreement was used to compare time spent within four physical activity intensity categories under three counts per minute (CPM) threshold protocols: (1) using thresholds developed specifically for each accelerometer, (2) applying ActiGraph thresholds to regression-rectified Actical CPM data, and (3) developing new 'optimal' Actical thresholds.

Results

Using Protocol 1, the Ac

SUBMITTER: Duncan S 

PROVIDER: S-EPMC5997323 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature