"I would recommend you to hold your breath until your SpO2 drops to 90%." ... I mean, who would say such a thing, right? :D But I totally recommend breathwork

"I would recommend you to hold your breath until your SpO2 drops to 90%." ... I mean, who would say such a thing, right? :D But I totally recommend breathwork ... to myself and I don't even wear a pulseoximeter.