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December 26, 2025 26 mins

In this enlightening episode of our podcast, Dr. Olli Tikkanen engages in a deep dive with the renowned Professor James F. Sallis, the newly appointed Distinguished Professor in the Department of Family Medicine and Public Health at the University of California, San Diego.

Professor Sallis, also the Director of Active Living Research and an "obesity warrior" as dubbed by Time Magazine, brings to the table over 40 years of experience in the field of physical activity and behavioral medicine.

The discussion kicks off with an exploration into the evolution of physical activity recommendations and the challenges faced in the past four decades. Professor Sallis shares invaluable insights into the meticulous process of developing reliable measures, from questionnaires to accelerometers guidelines, emphasizing the importance of accurate measurement in advancing scientific research.

As the conversation progresses, listeners are treated to a historical perspective on the development of these measures and the significance of adapting them to the ever-evolving world of technology and sedentary behavior.

Whether you're a researcher, a student, or simply someone interested in the intricacies of physical activity and its measurement, this episode promises a wealth of knowledge.

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This podcast episode is sponsored by Fibion Inc. | Better Sleep, Sedentary Behaviour and Physical Activity Research with Less Hassle

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Collect, store and manage SB and PA data easily and remotely -

Discover ground-breaking Fibion SENS

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SB and PA measurements, analysis, and feedback made easy. 

Learn more about Fibion Research

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Learn more about Fibion Sleep and Fibion Circadian Rhythm Solutions.

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Fibion Kids - Activity tracking designed for children.

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Collect self-report physical activity data easily and cost-effectively with Mimove.

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Explore our Wearables,  Experience sampling method (ESM), Sleep,  Heart rate variability (HRV), Sedentary Behavior and Physical Activity article collections for insights on related articles.

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Refer to our article "Physical Activity and Sedentary Behavior Measurements" for an exploration of active and sedentary lifestyle assessment methods.

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Learn about actigraphy in our guide: Exploring Actigraphy in Scientific Research: A Comprehensive Guide.

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Gain foundational ESM insights with "Introduction to Experience Sampling Method (ESM)" for a comprehensive overview.

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Explore accelerometer use in health research with our article "Measuring Physical Activity and Sedentary Behavior with Accelerometers ".

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For an introduction to the fundamental aspects of HRV, consider revisiting our Ultimate Guide to Heart Rate Variability.

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Follow the podcast on Twitter https://twitter.com/PA_Researcher

Follow host Dr Olli Tikkanen on Twitter https://twitter.com/ollitikkanen

Follow Fibion on Twitter https://twitter.com/fibion

https://www.youtube.com/@PA_Researcher

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