Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Validation of actigraph accelerometer estimates of total energy expenditure in young children

Reilly, John J and Kelly, L.A. and Montgomery, C. and Jackson, D.M. and Slater, C and Grant, S and Paton, J.Y. (2006) Validation of actigraph accelerometer estimates of total energy expenditure in young children. International Journal of Pediatric Obesity, 1 (3). pp. 161-167. ISSN 1747-7166

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Purpose. To assess the validity of two equations based on the Actigraph CSA/MTI accelerometer for prediction of total energy expenditure (TEE). Research methods and procedures. The criterion was TEE measured using the doubly labeled water method in 85 children, mean age 4.6 years (SD 1.1), over 7 days in the pre-schoolers and 10 days in the school-age participants. Children wore the Actigraph concurrently during waking hours, for 3 of 7 days (pre-schoolers) or 7 of 10 days (school-age children). We tested two prediction equations based on accelerometry. Agreement between predicted and measured TEE was assessed using the ‘Bland Altman’ approach. Results. Mean TEE measured by doubly-labeled water was 5.8 MJ/d (SD 1.6). Mean error for the Ekelund equation was + 0.3 MJ/d (limits of agreement − 3.7 to + 4.3), and for that of Puyau et al. was − 0.3 MJ/d (limits of agreement + 3.2 to − 3.8). Conclusions. Simple approaches using the Actigraph appear to be inadequate for the estimation of free-living TEE in young children at present.