This Is How You Know If You're in Zone 2 When Doing Cardio | Peter Attia, M.D.

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Peter Attia spends ~3 hours per week in zone 2 (he does so with 4 separate 45-minute cardio sessions). In this video, expect to learn:

  • How far into a cardio session you should be before measuring lactate to determine if you're in zone 2 (and the lactate level to look for)
  • The lactate meter Peter & Rhonda use
  • How to determine if you're in zone 2 using the "talk test"
  • Which is better for assessing zone 2: rate of perceived exertion or lactate?
  • How to determine if you're in zone 2 using heart rate
  • The app Peter checks every morning that predicts his zone 2 as a result of his heart rate variability

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