Nitrogen Leak During Cryotherapy Session in Paris Gym Leaves One Dead, Another in Coma

A fatal nitrogen leak at On Air gym in Paris is under investigation, raising concerns about cryotherapy safety and system maintenance.

A nitrogen leak during a cryotherapy session at the On Air gym in Paris resulted in the death of a 29-year-old employee and left a 34-year-old customer in an induced coma.
The injured customer remains in critical condition, with no improvement reported as of Tuesday evening, April 15, 2025.
Authorities are investigating possible ventilation and maintenance failures, with autopsies and toxicological analyses ordered to determine the precise cause of death.
Cryotherapy involves exposing the body to extremely low temperatures using nitrogen, which can displace oxygen in confined spaces, posing fatal risks if safety protocols fail.
The incident has intensified scrutiny over cryotherapy safety standards, with local officials and experts highlighting the need for stricter regulations and oversight.