Hey! So I was kind of in the same boat as you heading into basic last year, so here's how I dealt with it: no joke, the top of my foot would start to tingle and sometimes even go numb while i was running in prep for beast. I saw an ortho doc, and he said to just back off on running (I was overtraining, honestly) and run every other day. For some reason, that helped, but I still had the problem on the later part of my runs. Also, I got a nice big bump from swelling on my right leg when I ran, which I just concluded at the time was an anomaly or something. Anyways, I show up for BCT. First run with my flight, I had the same problem, ugh. I was quickly becoming the slowest in my flight because my right leg/foot acted up SO MUCH. But I dealt with it, and I turned out to be extremely lucky because my flight only ran maybe like 3 times during basic, so I never had serious issues. I got medical care for it around last November (that's when it really started bothering me again), and turns out I've had compartment syndrome for about a year and I had a fasciotomy (surgery) in January. My advice to you, though, through my experience- hold off a bit in seeking medical care unless it's actually REALLY bothering you to the point where it's intolerable. Maybe like a week in go to sick call (at breakfast every morning) and explain to the doctor (they're all really friendly aside from the madness that is basic) what's been going on and state up front you want to stay in BCT but was wondering if there's anything you can do to help it. They may run some x-rays and tests, but they'll definitely help. A F-18 is no problem at all during basic. You may get some crap from your cadre about it, but don't let that bother you. I was on a F-18 for 1.5 weeks and didn't let it bother me. Hope this helps!