In fact it is not so funny, chronic hyperventilation or "under-ventilation" caused by concentration or by worrying causes a fight-or-flight state of mind and ca

In fact it is not so funny, chronic hyperventilation or "under-ventilation" caused by concentration or by worrying causes a fight-or-flight state of mind and can lead to depression. My point being, don't write these articles off as snake oil too easily... Techniques like boxed breathing when you notice something is off, help a lot of people to mitigate imbalances in oxygen levels.