Peter Attia· MD
the pace they were running was the maximum aerobic pace and how did you come up with that heart rate that heart rate was derived in combination of a physical exam in my office i want to know how healthy they were i want to know about their history what did their labs look like their posture their strength and so forth and then they i would go out to the track and i would monitor their heart rate i'd monitor their gait while we use different heart rates and so i'd see them at a 120 heart rate i'd look at their gait i'd say this is it's a pretty good gait and then we'd go to 130 that's a pretty good game maybe even a little better and then go to 140 and i'd start seeing irregularities and then i'd bring them back to 130 and i'd see a nice smooth gate again and i'd put all that together and i'd assign them a certain maf heart rate