Estimating physical activity in youth using a wrist accelerometer.

ABSTRACT:

Purpose

The purpose of this study was to develop and validate methods for analyzing wrist accelerometer data in youth.

Methods

A total of 181 youth (mean ± SD; age, 12.0 ± 1.5 yr) completed 30 min of supine rest and 8 min each of 2 to 7 structured activities, selected from a list of 25. Receiver operating characteristic (ROC) curves and regression analyses were used to develop prediction equations for energy expenditure (child-METs; measured activity V˙O2 divided by measured resting V˙O2) and cut points for computing time spent in sedentary behaviors (SB), light (LPA), moderate (MPA), and vigorous (VPA) physical activity. Both vertical axis (VA) and vector magnitude (VM) counts per 5 s were used for this purpose. The validation study included 42 youth (age, 12.6 ± 0.8 yr) wh

SUBMITTER: Crouter SE 

PROVIDER: S-EPMC4362848 | biostudies-literature | 2015 May

REPOSITORIES: biostudies-literature