It's an empirical question. I would predict that you could do pretty darn well with height, weight, resting heart rate, blood pressure, bloodwork, and asking t

It's an empirical question. I would predict that you could do pretty darn well with height, weight, resting heart rate, blood pressure, bloodwork, and asking the patient about their physical activity. Fitness trackers are cool, but I'm just arguing against breathless health claims without justification.