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Updated: Jun 13, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Invited commentary: comparing physical activity across countries--current strengths and weaknesses
Kirsten Corder1, Esther M F van Sluijs
1Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, United Kingdom. kirsten.corder@mrc-epid.cam.ac.uk
Population physical activity levels are often low, necessitating better global data collection. Objective monitoring and international surveillance are crucial for understanding and improving public health outcomes worldwide.
Area of Science:
- Public Health
- Epidemiology
- Health Monitoring
Background:
- Physical activity is vital for health, yet population levels are concerningly low.
- A significant gap exists in large-scale, comparable data for assessing trends and inter-population differences.
- Current data collection methods are insufficient for robust public health research.
Purpose of the Study:
- To highlight the need for enhanced global physical activity surveillance.
- To advocate for the increased use of objective monitoring in longitudinal studies.
- To emphasize the importance of comparable measurement tools for international comparisons.
Main Methods:
- The study emphasizes the value of objective monitoring tools (e.g., accelerometers) over self-reported data.
- It calls for transparent research protocols and data reduction strategies in physical activity research.
- The need for prospective, objective physical activity data across diverse countries is stressed.
Main Results:
- Low population physical activity levels are a global concern, impacting both Western and developing nations.
- Objective monitoring provides more reliable data for assessing physical activity trends and population differences.
- International collaboration and data sharing are essential for effective surveillance.
Conclusions:
- Worldwide physical activity surveillance using objective measures is urgently needed.
- Such data is critical for addressing the global rise in obesity and metabolic disorders.
- Learning from successful interventions in maintaining or increasing physical activity levels globally is paramount.
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