So for the background..
I am a 25 year old male, currently serving in the Army. While running on August 8th I sprained my ankle, or so I thought at the time. It was swollen and difficult to walk on through the weekend, but I used RICE and on Monday I was back at work, walking just find For about a week and a half I focused on getting the sprain healed and keeping the motion in my ankle healthy. It seemed to heal up fine, but no matter what I retained a pain in my ankle when I would try to run and just couldn't get it better. I decide to go to the doctor on the 20th to get some guidance. Doctor tells me that with how well I am walking and moving around, she thinks things are fine, but sends me in for x-rays just in case. On the 22nd I get a call from my doctor telling me to head to the orthopedic department of the hospital and that the doctor is waiting there to give me a cast. It turns out I fractured my tibia down near my ankle, I believe on the front of it. After receiving cast, I was sent out on crutches. No real guidance other than "don't walk on it, see you in a few weeks".
Now my question, what can I do to heal this fracture in the absolute quickest possible time? The reason that I ask is that I am currently in a training timeline to join Special Operations and my next mandatory class starts November 3rd, roughly 10 weeks from now. I do not want to miss this class. The class is not too physically intensive, but will require a lot of running with some jumping, crawling etc. I am currently spending most of my time on the couch, and when I do have to go somewhere I use crutches, weight bearing at an absolute minimum. I haven't smoked since the initial injury, and haven't drank alcohol since my cast was put on. I have been focusing on eating as healthy as possible, maximizing protein and mineral intake, specifically calcium.
Any tips would be appreciated. Even if you think I know it, I'd still like to hear it. Making my class November 2nd is extremely important, so if there's anything at all I can do to try to speed this recovery I'm willing to try it.