Rodriguez G, Béghin L, Michaud L, Moreno LA, Turck D, Gottrand F. Comparison of the TriTrac-R3D accelerometer and a self-report activity diary with heart-rate monitoring for the assessment of energy expenditure in children. Br J Nutr 2002 Jun;87(6):623-31.
Determining total energy expenditure (EE) in children under free-living conditions has become of increasingly clinical interest. The aim of this study was to compare three different methods to assess EE triaxial accelerometry (TriTrac-R3D; Professional Products, Division of Reining International, Madison, WI, USA), activity diary and heart-rate (HR) monitoring combined with indirect calorimetry (IC). Twenty non-obese children and adolescents, aged 5.5 to 16.0 years, participated in this study. Results from the three methods were collected simultaneously under free-living conditions during the same 24 h schoolday period. Neither activity diary (5904 (sd 1756) kJ) nor the TriTrac-R3D (6389 (sd 979) kJ) showed statistical differences in 24 h total EE compared with HR monitoring (5965 (sd 1911) kJ). When considering different physical activity (PA) periods, compared with HR monitoring, activity diary underestimates total EE during sedentary periods (P<0.001) and overestimates total EE and PA-EE during PA periods (P<0.001) because of the high energy cost equivalence of activity levels. The TriTrac-R3D, compared with HR monitoring, shows good agreement for assessing PA-EE during PA periods (mean difference +0.25 (sd 1.9) kJ/min; 95 % CI for the bias -0.08, 0.58), but underestimates PA-EE and it does not show good precision during sedentary periods (-0.87 (sd 1.4) kJ/min, P<0.001). Correlation between the vector magnitude generated by the TriTrac-R3D accelerometer and EE of activities derived from HR monitoring is high. When compared with the HR method, the TriTrac-R3D and activity diary are not systematically accurate and must be carefully used for the assessment of children's EE depending on the purpose of each study.
The full text is available at https://dx.doi.org/10.1079/BJNBJN2002571
At A Glance
Individual Physical Activity Behavior Variables
Individual Physical Activity Behavior
Record or log
Number of Items
Most likely in French, although it was never explicitly stated.
Information about Development of Measure
Nothing to add
2 - 5 Years
6 - 11 Years
12 - 18 Years
Health Outcomes Assessed
BMI Measured or Self-reported
Data Reported on Race/Ethnicity
Data Reported on SES
How To Use
Third-party administered (e.g., parent/staff)
Instructions on Use
Data Collection/Analysis Costs
Collected information from 3 tools simultaneously under free-living conditions during same 24hr school day.
Instructions on Data Analysis
|Type of validity||Construct/subscale assessed||Criterion measure used||Test/statistic used||Result|
|Criterion||11 measures of energy expenditure||Measures compared to each other||Mean differences||Complex results concerning validity of different measures|
There are no reliability tests reported for this measure.