Peter Attia's Zone 2 training protocol includes 45-minute sessions on Tuesdays and Thursdays, and potentially longer sessions (90 minutes) on Saturdays and Sundays.

“for me it's always for me Tuesday, Thursday, Saturday, Sunday is zone two. It might be that those Saturday, Sunday workouts, I need to push them longer. Maybe I need to do 90 minutes on each of those days and stay at 45 minutes on Tuesday, Thursday.”

“personally i do about three to four hours a week of zone two and for my patients i believe that three hours should be the target”

“how often do i recommend doing zone twos at least three times a week i like four”

“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”

“remember 80% of my training volume is its own too uh only only 20% of my training volume is is is in that V2 max range”

“it's three days a week of zone two and one day a week of uh of of interval training but but interval training at that specific sort of four five upper limit 8 Minute intervals”

“Peter's weekly exercise routine: 4 hours of zone 2, 1 VO2 max workout, 4 strength training sessions.”