The thing with going in being fit and running daily is that she can avoid a lot of problems that plague other recruits...blisters, shin splints, cramping, etc. And, as was said above, being fit will reduce her stress. DIs will abuse those who can't keep up physically. Being able to will keep her out of their sights. The rifle/shooting thing? I had Rifle Merit Badge from Scouts. I knew basic marksmanship well. What I didn't expect was the feeling/sound of the buffer spring against me cheek. Didn't expect that. Took some time to get used to that. A little trigger time on an AR might be a benefit there. Oh, and tell her to run some more.