The importance of cardiorespiratory fitness in the United States: The need for a national registry: A policy statement from the american heart association

Kaminsky, L. A., Arena, R., Beckie, T. M., Brubaker, P. H., Church, T. S., Forman, D. E., … Williams, M. A. (2013). The importance of cardiorespiratory fitness in the United States: The need for a national registry: A policy statement from the american heart association. Circulation, 127(5), 652–662. https://doi.org/10.1161/CIR.0b013e31827ee100