Build a Sleep Schedule You Can Actually Keep
Use cycle timing as a rough guide while prioritising consistency and total duration.
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What common fitness estimates actually measure, where they break down for individuals, and when a clinician should be involved instead.
Use cycle timing as a rough guide while prioritising consistency and total duration.
Read guideWhat body mass index measures, what it cannot see, and where it misleads for individuals.
Read guideHow heart rate zones are estimated, why the age formula is approximate, and how to sanity-check them.
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