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exercise["Cardio""Zone 2""Mitochondria"
Zone 2 Training: The Foundation of Metabolic Health
Why low-intensity cardio matters more than you think, and how to implement it effectively
Dr. Iñigo San-Millán
13 min read
January 14, 2026
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Related Topics
["Cardio""Zone 2""Mitochondria""Endurance""Longevity"]