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6 days ago

What Is Zone 2 Cardio? The Tour de France Fitness Secret Explained

Zone 2 cardio used to live exclusively inside elite cycling labs and endurance coaches’ training logs. Now it’s all over wellness podcasts, fitness TikTok and longevity influencer feeds. And a major 2025 scientific review just made the story a lot more interesting. If you’ve been told that a slow, conversational jog is the single best thing you can do for a long life, here’s what’s actually going on. What Zone 2 Cardio Actually Is Zone 2 is steady aerobic exercise at 60 percent to 70 percent of your maximum heart rate, which you can roughly estimate as 220 minus your age. A...