Are you in Canada? Click here to proceed to the HK Canada website.

For all other locations, click here to continue to the HK US website.

Human Kinetics Logo

Purchase Courses or Access Digital Products

If you are looking to purchase online videos, online courses or to access previously purchased digital products please press continue.

Mare Nostrum Logo

Purchase Print Products or eBooks

Human Kinetics print books and eBooks are now distributed by Mare Nostrum, throughout the UK, Europe, Africa and Middle East, delivered to you from their warehouse. Please visit our new UK website to purchase Human Kinetics printed or eBooks.

Feedback Icon Feedback Get $15 Off

Human Kinetics is moving to summer hours. Starting May 31 – August 2, our hours will be Mon – Thurs, 7am – 5pm CDT. Orders placed on Friday with digital products/online courses will be processed immediately. Orders with physical products will be processed on the next business day.

Should we re-frame how we think about physical activity and sedentary behavior measurement?


Paul Kelly ©2018
You must log in to watch this webinar recording.

The measurement of physical activity (PA) and sedentary behavior (SB) is fundamental to health-related research, policy, and practice but there are well-known challenges to these measurements. Within the academic literature, the terms “validity” and “reliability” are frequently used when discussing PA and SB measurement to reassure the reader that they can trust the evidence.

In this webinar, Dr Paul Kelly will argue that a lack of consensus about the best way to define, assess, or utilize the concepts of validity and reliability has led to inconsistencies and confusion within the PA and SB evidence base.

Learning outcomes

  • Appreciate the difference and similarities of validity and reliability
  • Explain why miss-use of these terms has been detrimental to the evidence base
  • Consider better use of these terms, for better evidence generation

Presenter overview

Dr Paul Kelly has been a lecturer in Physical Activity for Health at the University of Edinburgh since September 2014. He is based at the Physical Activity for Health Research Centre (PAHRC) led by Professor Nanette Mutrie MBE. He teaches Physical Activity and Health, Applied Sports Science, Physical Education, Exercise Medicine and Medical degrees. His primary research focus is the measurement of physical activity and he has a keen interested in the measurement properties of different methods and how this influences our understanding of behavior and its outcomes. Dr Paul previously worked at the University of Oxford, where he completed a PhD (2010-2013) in using wearable cameras to measure active travel.