I am really interested in how this is measured. I have found this info on free sources so far<p>"The FIT Treadmill Score, calculated as [percentage of maximum predicted heart rate + 12(metabolic equivalents of task) – 4(age) + 43 if female]"<p>And this from another interview.<p>"In addition to age and gender, the formula factors in peak heart rate reached during intense exercise and the ability to tolerate physical exertion as measured by so-called metabolic equivalents, or METs, a gauge of how much energy the body expends during exercise. More vigorous activities require higher energy output (higher METs), better exercise tolerance and higher fitness level. An activity such as slow walking equals two METs, compared with eight for running."<p>If anyone has access to the paper and could better show the algorithm I would be super thankful.<p>EDIT: I think I figured out more but still not positive about MET unless the 2 for if heart rate hit max walking and 8 for if heart rate hit max with running.
[(Measured Heart Rate Max/(220-age))<i>100 + 12</i>MET - 4*age + (43 if female)]