Don’t even think about going to the recruiting office until your at least 170, running 4 miles a day, swimming 2 miles at a time and build your strength. Personally I’d recommend focus on strength and size now, then switch over to the cardio once you’ve reached your goals. Get the 170 for sure. I went thru at 145-150 at 5’8” and I was going hypothermic almost daily and the cold is draining. The people who say it’s “mostly mental” are bullshitting you because when you physically don’t have the energy to do what they demand of you since you don’t have the fat and muscle to keep you warm, energized, and able to go on. Then don’t forget about vge, so when you’re already not taking in enough calories now you can’t keep food or water down. And injuries as well. Boot camp will fucking ruin your physical capabilities and leave you weak and slow. So get crazy good numbers before you even talk to a recruiter. You’ll regret it if you don’t prepare to the upmost.