Why is it that we don’t often breath to our full capacity, we take shallow breathes and rarely take full breath

Question

Why is it that we don’t often breath to our full capacity, we take shallow breathes and rarely take full breath

In: 680

Answer 1

We are optimised to live in a middle zone for most of the time, taking in what we need with a big buffer for when we need to exert ourselves. If we lived at the maximum during normal activity, we would keel over and die when chased.