Lack of validity of free-living physical activity energy expenditure estimated from ActiGraph equations in severely obese women: A doubly labelled water study

Author(s)

Silva Vilela Ribeiro, Anna Gabriela ; Crisp, Alex Harley ; Ravelli, Michele Novaes ; Marques de Oliveira, Maria Rita ; Verlengia, Rozangela

• Document type: Journal article
• Source: JOURNAL OF SPORTS SCIENCES; v. N/A, p. 6-pg., 2022-06-22.

Abstract

The current study aimed to investigate the validity of three ActiGraph predictive equations that are available to estimate free-living physical activity energy expenditure (PAEE) in women with severe obesity. The study included 20 women with class III obesity (age: 22-38 years). During 14 days of free-living conditions, total energy expenditure was measured using the doubly labelled water method; in addition, participants wore a triaxial accelerometer (model GT3X+) on the hip. The resting metabolic rate was measured by indirect calorimetry. At group level, the Freedson VM3 Combination was found to be more precise (bias = -61 kcal/day) than the Williams Work-Energy (bias = -283 kcal/day) and the Freedson Combination equations (bias = -186 kcal/day) for estimating PAEE. However, the three predictive equations had a wider limit of agreement (Williams Work-Energy [258, -824 kcal/day], Freedson Combination equations [324, -697 kcal/day] and Freedson VM3 Combination [424, -546 kcal/day]), indicating great uncertainty of the estimate. In conclusion, a wide variation was observed in the performance of different ActiGraph equations in estimating free-living PAEE among women with class III obesity. Therefore, our data do not support the use of these equations, and more studies are needed to improve predictive performance in free-living conditions. (AU)

• FAPESP's process: 13/04420-4 - Assessment of the influence of metabolic and genetic factors on energy homeostasis after bariatric surgery
• Grantee: Maria Rita Marques de Oliveira
• Support Opportunities: Regular Research Grants