Typically, people with suspected asthma will be offered a spirometry test, which involves taking a deep breath in, then breathing out hard and fast for as long as possible into a tube to assess ...

In a post Gideon Horner is seen holding his breath for one minute as a timer ticks down from A to B claiming that those who can do so are in a prestigious group of only one in 20 people.

For reference, a medical-grade chamber can be delivered at 44.1 PSI, per the University of Kansas Health System. Still, hyperbaric oxygen chambers are not without their risks.