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Updated: Dec 18, 2025
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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
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Sedentary behavior, physical activity and body composition in adults
Gerson Luis de Moraes Ferrari1,2, Eduardo Rossato de Victo2, Irina Kovalskys3
1. Laboratorio de Ciencias de la Actividad Física, el Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, USACH, Santiago, Chile.
Revista Da Associacao Medica Brasileira (1992)
|June 11, 2020
Summary
Physical activity and sedentary behavior have different associations with body composition in Brazilian men and women. Understanding these sex-specific relationships is crucial for targeted health interventions.
Area of Science:
- Public Health
- Exercise Science
- Human Physiology
Background:
- Sedentary behavior (SB) and moderate-to-vigorous physical activity (MVPA) are key determinants of health.
- Body composition, including abdominal perimeter (AP) and neck circumference (NC), is linked to metabolic health.
- Previous research has not fully elucidated sex-specific associations between objectively measured physical activity and body composition in diverse adult populations.
Purpose of the Study:
- To investigate the associations between objectively assessed SB and MVPA with body composition variables.
- To examine these associations in a representative sample of Brazilian adults.
- To identify potential sex differences in these relationships.
Main Methods:
- Objective assessment of SB and MVPA using accelerometers for at least 5 days in 524 Brazilian adults (18-65 years).
- Classification of minute epochs into sedentary, light (LPA), moderate (MPA), or vigorous (VPA) physical activity.
- Measurement of body composition variables: abdominal perimeter (AP) and neck circumference (NC).
Main Results:
- Men exhibited significantly higher MPA, VPA, MVPA, and steps/day than women.
- In men, MPA, VPA, MVPA, and steps/day were inversely associated with AP, independent of SB.
- VPA was associated with NC in men, while SB was associated with AP in women; no significant associations were found between physical activity intensities and body composition in women.
Conclusions:
- Significant sex differences exist in the associations between physical activity, sedentary behavior, and body composition.
- These findings highlight the need for sex-specific approaches in designing public health interventions.
- Tailoring strategies based on these unequal associations can improve health outcomes in Brazil.
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