Zone 2 Cardio: The Boring Workout Everyone's Talking About (Why It Works Better Than HIIT) (2026)

Zone 2 cardio is blowing up thanks to Peter Attia and Andrew Huberman. It's boring as hell, but the science is undeniable.

What is Zone 2? Low-intensity steady cardio where you can talk in full sentences but you're slightly out of breath.

Why it works:

• Builds mitochondria (cellular powerhouses for fat burning)
• Improves VO2 max without the stress of HIIT
• Doesn't interfere with strength training recovery
• Better for longevity and healthspan

Zone 2 vs HIIT:

• HIIT: Burns more calories during workout, spikes cortisol, hard to recover from
• Zone 2: Burns fat as primary fuel, low stress, can do 4+ hours/week

How much: 2-4 hours per week minimum

Best exercises:

• Incline walking (3-4 mph, 5-10% incline)
• Cycling
• Rowing
• Swimming

My take: 80% Zone 2, 20% high-intensity = best of both worlds

More details: https://fytslifestyle.com/blog.html

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Tags: #zone2cardio #cardio #fitness #longevity #peterattia #andrewhuberman