Skip to content
Protocol$$$Expensive: Several hundred dollars and up.

Whole-body cryotherapy

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

Nitrogen-cooled air at somewhere between minus 100 and minus 150 degrees Celsius, for two to three minutes, standing in a chamber with your head out or fully enclosed. Gloves, socks, a hat and often a mask stay on, because exposed skin is the limiting factor. Athletes and actors book it after training for the reasons people use ice baths: it feels good afterwards, soreness eases, sleep comes more easily. Controlled evidence for muscle recovery is mixed and the effect is short-lived, so it sits alongside a training program rather than replacing anything in it. Studios in most cities sell sessions, at a price well above a cold plunge at home.

People on record

Sorted by strength of stance

Does it: documented as part of their own routine. Recommends: explicitly advises other people to do it. Discusses: covered it substantively without clear personal adoption; this can include criticism or disagreement.

Other entries filed under fitness or sleep.

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

    WHOOP

    Screenless wrist strap tracking strain, recovery and sleep

    On record from 6 of 62 tracked people: 4 do it, 1 recommends it, 1 has discussed it
  • Gear$$$Mid: Roughly $50 to $500, or up to $50/month.

    Apple Watch

    Apple's wrist computer for activity, sleep and notifications

    On record from 1 of 62 tracked people: 1 does it
  • Gear$$$Expensive: Several hundred dollars and up.

    Apple Watch Ultra

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

    On record from 1 of 62 tracked people: 1 does it
  • App$$$Mid: Roughly $50 to $500, or up to $50/month.

    Centr

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

    On record from 1 of 62 tracked people: 1 recommends it
  • Habit$$$Cheap: Roughly under $50, or under $15/month.

    Respiratory rate tracking

    Watching overnight breathing rate as an early fatigue and illness signal

    On record from 1 of 62 tracked people: 1 does it
  • Protocol$$$Cheap: Roughly under $50, or under $15/month.

    Resistance training

    Lifting weights 2-4 times a week to build and hold muscle

    On record from 43 of 62 tracked people: 37 do it, 4 recommend it, 2 have discussed it

Protocol 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.