Episode
#492 Jason Brown - In Defense of Zone 2 Cardio
- Published
- Aug 4, 2026
- Duration seconds
- 3453
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Summary
Jason Brown returns for a nuanced discussion about Zone 2 cardio, walking, conditioning, stress, recovery, and how cardio should fit into an individual’s life. Jason joins me to discuss: • Whether Zone 2 cardio is actually overrated • How much of Zone 2’s benefit comes from simply getting people moving • The value of reducing sedentary time and increasing daily activity • The relationship between Zone 2-style activity, NEAT, and mental health • Why getting outside and moving can provide benefits beyond fitness adaptations • Looking at cardio and all training through the lens of nervous system regulation • Accounting for the total stress already present in someone’s life • Why cardio recommendations should begin with the individual’s available time and capacity • The nuanced debate around whether walking counts as exercise • Why sprint training should not be treated as Zone 2 cardio • Why average heart rate during lifting or high-intensity training does not prove someone received a Zone 2 stimulus • The difference between cardiovascular strain and sustained aerobic work • Why exercise labels matter less than matching the activity to the person’s needs • Jason’s thoughts on the current state of online coaching • And much more Follow Jason on Instagram: @jasonbrowntraining CHAPTERS 01:04 Setting Up the Zone 2 Controversy 01:59 Who Is Zone 2 Cardio For? 05:05 Social Media Hot Takes 07:02 The Benefits of Sustained Aerobic Work 10:41 Andrew’s Questions About Zone 2 14:45 Mechanisms and Aerobic Adaptations 21:13 Time Constraints and Effective Dosing 29:07 Does Walking Count as Exercise? 30:53 Walking as Therapy 33:20 Regulation Matters More Than Debates 34:09 Plug-and-Play Training 35:40 Why Speed Training Is Not Zone 2 37:35 The Limits of Heart Rate as a Proxy 39:39 Genetics…