Only z2 is for complete noobs. UA actually recommends 80/20 split between z1 and... | Hacker News

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dilyevsky 80 days ago | parent | context | favorite | on: Sauna effect on heart rate

Only z2 is for complete noobs. UA actually recommends 80/20 split between z1 and upper z3

MyHonestOpinon 79 days ago [–]

What (or WHo) is UA ?

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