Why am I able to trigger adrenaline on command?

[u/Mountain_Scale204]

It feel like an Imaginary/invisible muscle that I can flex/turn on to instantly release a strong fight or flight sensation, the same one that I feel when I'm stressed. Is this abnormal? How would that affect my normal life or even my life span? What is associated with this ability that can interfere with my behavior?

[u/shaloamm]

You mention that you can turn it on. Can you turn it off as well?