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Habit$$$Cheap: Roughly under $50, or under $15/month.

Respiratory rate tracking

Watching overnight breathing rate as an early fatigue and illness signal

Most sleep wearables record breaths per minute through the night. Against a personal baseline, a jump of a breath or two often shows up before heart rate variability or resting heart rate move, which makes it useful for spotting illness, alcohol, a hard session or a short night. The trend is the signal; a single reading is not. It needs weeks of data before the baseline means anything.

Who backs it

Sorted by strength of stance

Other entries filed under fitness or sleep.

  • Gear$$$Mid: Roughly $50 to $500, or up to $50/month.

    WHOOP

    WHOOP

    Screenless wrist strap tracking strain, recovery and sleep

    Backed by 6 of 62 stacks: 4 do it, 1 recommend it, 1 have discussed it
  • Gear$$$Mid: Roughly $50 to $500, or up to $50/month.

    Apple Watch

    Apple

    Apple's wrist computer for activity, sleep and notifications

    Backed by 1 of 62 stacks: 1 do it, 0 recommend it, 0 have discussed it
  • Gear$$$Expensive: Several hundred dollars and up.

    Apple Watch Ultra

    Apple

    Apple's biggest watch: titanium case, brighter screen, more than a day of battery

    Backed by 1 of 62 stacks: 1 do it, 0 recommend it, 0 have discussed it
  • App$$$Mid: Roughly $50 to $500, or up to $50/month.

    Centr

    Centr

    Chris Hemsworth's training, nutrition and meditation app, built with his own team

    Backed by 1 of 62 stacks: 0 do it, 1 recommend it, 0 have discussed it
  • Protocol$$$Expensive: Several hundred dollars and up.

    Whole-body cryotherapy

    Two to three minutes standing in a chamber cooled by liquid nitrogen vapor

    Backed by 1 of 62 stacks: 1 do it, 0 recommend it, 0 have discussed it
  • HabitFREE, no cost

    Daily walking

    A long walk most days, often without headphones

    Backed by 19 of 62 stacks: 14 do it, 5 recommend it, 0 have discussed it

Habit entry · notes paraphrased from cited sources, quoted excerpts copied from the transcript they link to. Not medical advice. Not affiliated with, endorsed by, or reviewed by anyone listed. How this works.