Overview

• A 29-year-old gym employee died and a 34-year-old client remains in critical condition after a nitrogen leak at On Air gym in Paris on Monday evening.
• Preliminary findings suggest the nitrogen leak displaced oxygen in the cryotherapy chamber, leading to cardiorespiratory arrest for both women.
• Three individuals who attempted to provide first aid were also hospitalized with mild injuries, and 150 people were evacuated from the gym.
• Investigators are examining whether plumbing work conducted earlier in the day contributed to the malfunction that caused the leak.
• The incident has reignited concerns over the safety of cryotherapy and its unproven health benefits, prompting calls for stricter regulatory oversight.