Peter Attia performs 45-minute Zone 2 cardio sessions on Tuesdays, Thursdays, and Sundays, and on Saturdays he does a Zone 2 session followed by a Zone 5 session.

“tuesday thursday sunday our zone two saturday is either a zone two followed by a zone five that's kind of a separate workout so each of those are 45-minute zone twos and then kind of like a 30-minute zone five as a separate workout that's done almost immediately after”

“but i want people to notice the relative amount of zone two to zone five right so um my zone two is five times slightly more than five times the not just the duration but more importantly it's eight times the duration but it's five times the the met hour so the the aggregate intensity the integral intensity and that's going to become an important point when we start to talk about how you would partition your time between zone two and zone five”

“so directionally you total that up and you can see okay it's about 100 met hours per week of activity there's the breakdown by percent where they are and we'll come to this in a minute but i want people to notice the relative amount of zone two to zone five right so um my zone two is five times slightly more than five times the not just the duration but more importantly it's eight times the duration but it's five times the the met hour so the the aggregate intensity the integral intensity”