The Compendium of Physical Activities is an essential resource for researchers and health professionals, first introduced in 1989. It aims to provide standardized measurements and classifications of physical activities, enabling a reliable assessment of energy expenditure and health benefits associated with various activities. The latest 2024 edition includes updates to the Adult Compendium, the introduction of a specialized Older Adult Compendium, and a comprehensive Wheelchair Compendium.

Led by Dr. Barbara E. Ainsworth and a dedicated team of researchers, the compendium supports a wide range of users. It is freely available for commercial purposes and educational use, making it ideal for teachers and academics. Users can download the compendium to aid in their research, ensuring that the MET values for over 500 activities remain intact and appropriately cited. Comprehensive lists and additional resources are also provided to foster a deeper understanding of physical activity's energy costs. For more details, visit their official site at https://pacompendium.com/.