The Mana journal
Know your body.
Read the trend.
Short notes on what a band like Mana actually measures — heart, sleep and recovery — and how to read it. Plain language, backed by original sources.
Latest
05 articles
Resting HR · 8 weeks
56bpm
6 bpm from week 1
4 min read
Your resting heart rate is a trend, not a number.
One of the simplest things a band can measure is also one of the most telling — as long as you read it over weeks, not mornings.
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HRV · 7-day average
58ms
Your baseline, not a target
4 min read
HRV, without the jargon.
Heart rate variability sounds technical, but the idea is simple — and the most useful way to read it is against yourself.
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Sleep · this week
7h 55mavg
In bed ±12 min, night after night
5 min read
Sleep on schedule. It counts more than you think.
Seven hours is the number everyone knows. The research on when you sleep — and what you look at before you do — is just as interesting.
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Steps · this week
8,386a day
Most days inside the plateau band
4 min read
10,000 steps? The number is softer than you think.
Ten thousand steps is everywhere — but the research points to a range, not a target, and it depends on your age.
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Resting HR + skin temp
+7bpm vs normal
Rose two days before symptoms
5 min read
Your body often knows before you do.
When you’re coming down with something, it can show up in your resting heart rate and skin temperature days before you feel it.
Read articleWear less. Know more.
Mana launches Q4 2026. Be among the first to wear it.