The 4 BREATHING SECRETS That Will TRANSFORM Your Health Today! | James Nestor

Nestor describes 'email apnea', where people stop breathing or breathe dysfunctionally at their desks, and says this can spike blood glucose and adrenaline. Chatterjee adds that the body is doing what it is designed to do, so the fix is giving it a different signal.

Nestor says signals travel from brain to organs and from organs back to the brain, so slower breathing can change how the mind processes thoughts and emotions. He says this is not a placebo.

Nestor says nasal breathing lets athletes work harder at a lower heart rate and keeps the body aerobic longer. He passes on Patrick McKeown's advice never to work out harder than you can breathe correctly.

Nestor clarifies that laughing, talking or swimming with the mouth open is natural, and that the concern is chronic mouth breathing across roughly 25,000 daily breaths. He describes a tiny piece of tape across the lips at night as a way to train the mouth shut.

Nestor says practices like Wim Hof breathing stress the body briefly, much like interval training, so the rest of the day can be calmer. He adds that people with anxiety or panic should start with gentle practices like three seconds in and three seconds out.