It’s a cloudy Tuesday morning and Sarah Campus has arrived at a small and unassuming sports clinic in the grounds of Twickenham Stadium for her monthly biohacking session. Behind her lies a hyperbaric oxygen chamber, which looks like something straight out of a science-fiction film (and is eerily reminiscent of the Titanic submersible).
The practitioner — a tall South African man named Pieter — guides her over to the beige, metal chamber. Campus slips off her shoes, hands over her phone and keys, and slides her body into the machine. It’s seven-and-a-half feet long, so there’s plenty of space for Campus to stretch out her legs, but it’s narrow and coffin-like and there’s no quick exit once she’s in. It’s also emitting a deep, throbbing hum which makes the room sound like a hospital ward.
