In episode 75, we’re joined by Dr. Stephen Seiler, one of the top exercise physiologists working today. Dr. Seiler has talked with us previously about the polarized, or 80/20, model of endurance training. He’s shared his thoughts on zone models, and he’s helped us understand how slow your “slow” should be. You’ve sent us more questions about those two episodes than any other episodes we’ve done, but the most common question has been “when’s part 3?” Well, this is that episode on the othe

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