4x10 is rough. I’ve been in positions that started with 5x8 then went to 4x10, then others 8,10, or 12 with built in overtime or comp time to get to 40hrs average.

You end up trying to cheat meals for speed eating unhealthy. High amounts of caffeine, little family time, and at least the first day off is usually wasted catching up on lost sleep. If you happen to do shift work, good luck trying to get much done as you need to shift to a different schedule to be somewhere during open hours.

We were more inefficient going from 5x8 to 4x10. Try training on little sleep before coffee kicks in. You need to re-do it later. Try sleeping after drinking coffee all day to stay awake, it’s great for your heart and blood pressure.