what it boot camp like?

It is like military training, there is a lot of marching and exercising, doing  chores that require exertion. There is also a mental toughness element where they test the temperament of the inmates during these tasks, sort of like a drill sergeant in basic training. They work them hard, they are plenty exhausted when they check into their bunks to go to sleep. Not a lot of time for nonsense or trouble-making. It's designed to break young men from breaking the law into the future. Most of the time it works.