[ericdykstra]

Sleep is one of the three pillars of health. There are also many fitness and diet articles that gain traction.

As to why health is popular on HN, it's hard to be interested in the other stuff if you're dead! (I don't actually know why, I'm interested in these all personally, but nearly never upvote the articles myself)

[apatters]

Well, many developers probably aren't in the best health because the job requires sitting all day. Everyone wants to be healthy so there will be a natural demand for articles about it amongst developers.