The brain is extremely sensitive to the amount of oxygen it receives. A few minutes without and we already fall unconscious. This indicates that the level of oxygen is essential for a properly functioning nervous system. When we are under stress, our nervous system is under great pressure. At that moment that organ is working at full speed. Then the need for oxygen is particularly high. Then oxygen is even more important than ever.
At that moment, walking in the woods or biking in the fields or just walking for an hour while breathing well means beneficial care for the brain. When we are under pressure, breathing well and refueling extra oxygen is the best care for our brain .