I wish I had this written down somewhere, but I don't; perhaps it's well known enough that someone else can correct my mediocre paraphrasing:
A Marine once told a civilian that everyone is programmed to believe their 80% remaining is their 0% remaining, and the courageous work of realizing that limitation is what unlocks the extreme feats that someone so well physically and mentally conditioned can undergo.
I'm not military, don't know anyone military, and have no particular leanings, but I have always been absolutely invigorated by the apparent, quiet force that service members project. It's inspirational even devoid of agenda.
> everyone is programmed to believe their 80% remaining is their 0% remaining
Of course. When I do my reps in the gym, I know I could do more if someone put a gun to my head. I stop because I don't want to hurt myself, not because I cannot do anymore. When I feel sleepy in the evening, I am fully aware that I could go 48 more hours without sleep if I really needed to. But would it be a good idea? No, it would not be.
And even if we ignore obvious health risk of pushing yourself to the limit, in general, I would rather be more comfortable than more productive. There are always things to be done, so why stress about doing a little bit more?
Then it sounds like you don't actually believe you're at 0% remaining. What your parent is saying, and what I've observed myself, is that most people really believe they physically cannot (say) run any further.
> most people really believe they physically cannot (say) run
Do they? I would expect that when you "physically cannot run", it means you are collapsed in a pile on the ground unable to stand or move. People might say things like "I cannot run another step", but that is not the same as actually believing it. That said, unless you are very fit and very young, it might not be a good idea to get yourself to the point where you actually cannot run anymore. Unless there is a tiger chasing you or something.
I have fallen over on the ground after 20 miles of running in both legs my quads and hamstrings were cramping. I got up and ran another 10 miles. Didn't have any choice, either run 5 miles back to the check-in table or 10 miles to finish the race.
A cramp is not being at your limits. A good stretch and your ready to continue.
This https://www.youtube.com/watch?v=CKWWRS9CpTY is being at your limits. But I'm willing to bet that a tiger would make her body remember that maaaybe there is actually (a lot) more energy left to keep going.
Without getting philosophical about the definition of "belief," the point I took away was that people have a hell of a lot more left than they normally admit to themselves, even when the bar is merely "I'd be injured" rather than "I literally cannot." This may be more true for cardio than weights.
Usually that %80 left at their %0 left is done with fairly horrendous form, which leads to injury. Try putting perfect form on that condition and most would fail soon after.
In general people have way more capacity than they believe. Our worlds are built around immediate, short term gratification. I find that doing something everyday that's uncomfortable helps me stay out of the short term gratification trap. Getting up early when the alarm goes off, exercising, intermittent fasting, BJJ, are all things that at times are hard and uncomfortable, but they are a constant reminder of the capacity that we as humans have to excel.
You just end up getting tired and going to bed early that night. If you can make yourself do it, it’s a lot more effective to fix sleep schedules by pulling instead of pushing.
It's primarily because in the military you get used to the ideas that you are in big trouble if you are not on time and also that you cannot fail (failure may mean death). That plus the quiet confidence you gain in yourself and others helps add some of that extra sauce.
A Marine once told a civilian that everyone is programmed to believe their 80% remaining is their 0% remaining, and the courageous work of realizing that limitation is what unlocks the extreme feats that someone so well physically and mentally conditioned can undergo.
I'm not military, don't know anyone military, and have no particular leanings, but I have always been absolutely invigorated by the apparent, quiet force that service members project. It's inspirational even devoid of agenda.