Related Experiment Video
Updated: Mar 13, 2026

05:59
Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
7.3K
Physical activity and sedentary behavior in Belgium (BNFCS2014): design, methods and expected outcomes
Thérésa Lebacq1, Cloë Ost1, Sarah Bel1
1Scientific Institute of Public Health, Department of Public Health and Surveillance, Unit Surveys, Lifestyle and Chronic Diseases, Brussels, Belgium.
Archives of Public Health = Archives Belges De Sante Publique
|October 26, 2016
Summary
Accurate measurement of physical activity and sedentary behavior is crucial for public health. The Belgian National Food Consumption Survey 2014 (BNFCS2014) used accelerometers and diaries to assess these behaviors in children and adolescents.
Area of Science:
- Public Health
- Epidemiology
- Human Movement Science
Background:
- Regular moderate-intensity physical activity is linked to health benefits.
- Sedentary behavior increases the risk of all-cause mortality.
- Accurate measurement of physical activity and sedentary behavior is vital for public health recommendations.
Purpose of the Study:
- To describe the methodology for assessing physical activity and sedentary behavior in the Belgian population.
- To provide a comprehensive picture of physical activity and sedentary behavior in Belgium.
- To focus on children and adolescents (3-17 years).
Main Methods:
- Cross-sectional data collection via the Belgian National Food Consumption Survey 2014 (BNFCS2014).
- Accelerometer (Actigraph® GT3X) use for 7 consecutive days in children and adolescents (3-17 years).
- Complementary activity diaries and self-reported questionnaires (ToyBox, FPAQ, IPAQ) were used; adults (18-64 years) relied solely on IPAQ.
Main Results:
- Data collected between February 2014 and May 2015 from a nationally representative sample.
- Accelerometer data processed using Evenson cut points for intensity levels (sedentary, low, moderate, vigorous).
- Adult physical activity assessed via self-reported International Physical Activity Questionnaire (IPAQ).
Conclusions:
- BNFCS2014 provides comprehensive data on physical activity and sedentary behavior in Belgium.
- Results allow comparison with international guidelines and analysis by background variables.
- Findings aim to inform future public health policies on physical activity.

