The Mayo Clinic Procedures Journal hosts an article describing the project to create a registry of cardiorespiratory fitness (CRF) reference values. Given the importance of CRF in estimating health risk, it is essential to have accurate reference values to know what constitutes a “normal” value.

A new review study has been published in the Journal of Sports Medicine and Physical Fitness discussing the validity, reliability and principles of operations of existing portable open-circuit spirometry system.