In recent years, the importance of measuring, estimating, and monitoring cardiorespiratory fitness (CRF) has been increasing. CRF is a good indicator of overall health and, according to a statement paper from the American Heart Association, it is potentially a stronger predictor of mortality, compared to commonly used risk factors.
From the Statement Paper from the American Heart Association
“At a minimum, all adults should have CRF estimated each year using a non-exercise algorithm during their annual healthcare examination. Clinicians may consider the use of submaximal exercise tests or field tests as alternatives because these involve individual-specific exercise responses.“