Validity of the Actigraph-GT9X accelerometer for measuring steps and energy expenditures in heart failure patients.

ABSTRACT:

Introduction

The ActiGraph (AG) accelerometer is widely used to assess physical activity (PA) in heart failure (HF) patients. However, the validity of the AG in this population remains unexplored.

Objective

Therefore, this study examined the criterion validity of the AG-GT9X for measuring step counts (SC) and energy expenditure (EE) among HF patients.

Methods

16 patients with HF with preserved ejection fraction (mean age = 60.3±12.1yrs) completed a total of 41 symptom-limited cardiopulmonary exercise tests on a treadmill across multiple time points (median (IQR) = 2.5 (1.5-3.5)). All participants wore the AG (model: GT9X) on both the right ankle and waist locations during the test. Manually counted steps and indirect calorimetry-derived EE served as criterion measures

SUBMITTER: Kim J 

PROVIDER: S-EPMC11684600 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature