Originally Posted by EJSpins
First question why would you want to stay in ketosis during school? It's an uncontrolled variable when dealing with mixed gas diving; no one is going to do a study on oxygen toxicity, nitrogen off gassing, etc. in ketosis.
Although if you can get ahold of Dr.(MD) Bruce Wienke (NASA Dive Physiologist, expert on decompression) he might be able to give you an answer on that.
Regarding training, you need to train for event as well as maximizing your overall fitness. Basic fact of military schools is the entry PT tests are a joke. For most rigorous schools (dive school, BUDS, Sniper School, SF selection) if you can't crush the entry PT you won't last. Not trying to demotivate, just making sure your head is on straight.
Nothing wrong with Crossfit at all, to get your overall fitness level up. But you have to make sure to build your swim and your run up, both of which require technique to master. Join a Masters Swim team if you can, take a swim class if you suck.
For your goals I wouldn't really recommend any weight lifting, except maybe once a week (basic squat, bench, overhead press, deadlifts, etc).
Whats your current fitness state? How is your swim and run? How is your overall strength? I can make some more informed opinions given that.
"Go For Broke"
Fat Kine-230/24% @ 6'2"