hello! so, i’ve been reading your posts for some time and i was wondering about how the adrenaline really works in a fight. i read an article saying that adrenaline, specially when “normal” people fight (not pro fighters), works like an advice to run for your life. not like something that inspires you to fight. but, i can’t confirm this information, because i can’t find another person talking about it. so, may u write something about how adrenaline works in real situations? thank u so much!hwfflepff
The short answer is that adrenaline is a hormone. When threatened, your adrenal gland secretes epinephrine (adrenaline.) Like most hormones, it affects a many organs uniquely.
I’m going to be a little reductive here, the major effect is that adrenaline increases the conversion of sugar into energy, and reduces the production of insulin, meaning you’ll keep that energy longer. It also increases your respiration rate, hyper-oxygenating your blood, and your heart rate, getting that hyper-oxygenated blood to your brain.
Adrenaline increases your pain tolerance significantly. Though, I’m not sure what the mode of action is for this effect. It also increases your apparent strength, though this is a little misleading. Humans are, in general, much stronger than most people realize. However, we moderate to prevent self-injury. Because adrenaline reduces pain, in combination with the other changes, this results in a significant strength increase. The reason you wouldn’t normally do this is that you’ll pull, wrench, and sprain muscles. This is still true during an adrenaline rush. You just don’t feel the pain, but it doesn’t make you more resistant to damage.
The entire result is vaguely analogous to, “overclocking,” your body. It will function more effectively for the duration, but the process is very stressful for your body overall. It’s a biological function that prioritizes immediate survival over general health.
After the immediate threat passes, the individual will be left with a lot of nervous energy from the rush. They’ll be jittery. This leads to a comment I’ve made before; I deeply dislike adrenaline rushes. It’s useful in the moment, but in my experience it always outlasts the provoking incident. Though, I’m fully aware my experiences are not universal. While it’s not going to be true for everyone, figure your adrenaline will crash roughly an hour after the initial rush. (The exception would be if you’re under constant stress. In those cases, the heightened adrenaline levels can persist for the duration.)
When your adrenaline crashes, you’re going to feel exhausted (and potentially nauseous.) This is the normal consequences of what you just put your body through. You will become aware of injuries you sustained during the rush, including some of the muscles you overtaxed.
If heightened adrenaline levels are maintained for long periods of time, this can have disastrous effects on the heart. You really cannot safely sustain the elevated heart rate, and eventually it will fail. Because adrenaline rushes are triggered by stress, they can be caused in situations where they’re neither useful nor helpful. This can include constant adrenaline production because of stress. PTSD is one situation where adrenaline rushes can be triggered by an inappropriate stimuli. This can pose a real health threat. This can kill you.
Adrenaline will not grant you insights into fighting. The fight or flight response is a biological response to danger. It’s important to understand, “fight or flight,” is a single response. It’s not like you have a, “fight,” response, and, a separate “flight,” response, it is a single biological response for either course of action.
Adrenaline is not “blind instinct.” While it will affect your brain, it’s not going to shut you down into a feral fugue. You’re still (theoretically), a rational, sapient being. Adrenaline doesn’t change that. You will be thinking faster, but not smarter, so if you’re prone to making dumb decisions you can now expedite that process.
In two words, “not fun.” Adrenaline is a useful survival tool. It can be the difference of living and dying, however, it is just a chemical your body keeps around in case things go horribly wrong.