My roommate in Nuc school was on mandatory exercise and mandatory study. Not counting sleep, he had something like 10 hours of free time a week. He also drank 2 liters of mountain dew a day and use F#@$ the same way most people use "um". The other roommate timed him once, he used a version of F@#$ 60 times in 2 minutes.
Also knew a guy in nuke school who spent more time figuring out how he could game the system of 10 minutes by planning his breaks and when he signed in to study than actually studying.
Also knew a guy raised on a commune in the dessert and several guys we called "+1", no matter what your story was, they had one better. One of those guys couldn't go to china town because he'd be "recognized" another, BIF, had been a drug kingpin in Texas. BIF meant big idiot fuck up. This probably set me on the road to skepticism.
The most valuable lesson from the military and the one you really can't get elsewhere is how to live and work with people you hadn't even imagined existed prior to meeting them. Universities offer a pretense at diversity but the Navy really had it and you had no choice but to spend 24/7 for six months straight with those people.
But I digress.