re: Explain it to me like I’m 5 - Running edition

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i don't fully understand how one should measure progress. yes for a beginner pretty much any method of being active will lead to progress.

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This is kind of where I am too. I guess for people who have no running background and would tend to injure themselves or burn out, a Z2 approach like Maffetone keeps them from doing too much; but I'm wary of any "system" that bases its training too much on HR, especially with a formula. I've got thousands of lifetime miles and know what easy feels like. Why do I need to check my watch to make sure I'm at 150bpm and not 160? What if it's hot out? Am I expected to slow my pace to a walk if it's too humid? How does that prepare me for races that are going to be hot and humid?