I've recovered from a few of these, and for exercise turn to the pull-up bar. Getting up and down on one good foot is pretty easy, and you have lots of options. Pull ups of various types, take this time to work towards something that was beyond you with static hangs. Toes to bar, knees to elbows, and even elbows to knees if you're confident (hanging from your knees/calves.

For therapy, I become more religious with the foam roller to release my calf muscles. Tendons put incredible strain on small bones of the foot. Remodeling of one bone area to cope with this inevitably steals calcium from another area. I've had stress fractures of the styloid process on my pinky-toe on both feet due to tight/overtrained calves.

I rely on these techniques because my circulation is kind of shot in my lower legs, so recover/repair doesn't happen well without some help. Before getting out of bed every morning, and putting weight on my feet, I trigger-point massage each calf on the opposite knee to keep plantar fascitis at bay. Keeping the surrounding muscles well fed and happy is key to any repetitive stress injury like a stress fracture.

Wow, foot injury...well other than fight through it or the dreaded rest advice, swimming comes to mind. Perhaps a stationary bike would be tolerable.

Other than that, just figure out through trial and error what you can or can't do. Definitely eliminate anything that requires your foot to impact the ground (running, jumps, maybe even walking).

I hate to recommend isometric exercises, but do machine lifts to maintain strength in your legs. Leg curls/extensions should not put any pressure on your foot.

Injuries suck but a reality for those that train. I pulled a hamstring and aggravated a shoulder which now has chronic inflammation. Good luck with yours.

Ouch! To help your bones heal fast, get your D level tested & sun/supplement to 60-80 ng/ml. Also make sure you are getting sufficient Magnesium (200-600 mg), as well as Vitamins A & K.

I actually found being off my foot (ligament tear = 6 weeks in a boot + 6 weeks PT) helped me fine-tune my diet. I wasn't worrying so much about fueling performance at that point and I could kind of tweak my intake for better health. (Granted, during that time I noticed more food sensitivities, that's icky.)

Definitely make sure you get enough Vit D!

I didn't snack. That was the most challenging thing for me because I was used to eating after working out. BUT, I got some good habits out of that.

I also focused on resting more (sleeping) and dealing with my stress levels.

Anyway, I was SO glad to be able to start working out on my own again (a few weeks ago). But, working on other aspects of my life was helpful in keeping myself from going crazy when I was in the boot.

Until you can put a little weight on your leg, don't push yourself too hard. You need to focus on healing first, I think. Have you seen the article on the Whole9 site about what to do when you're banged up? It's worth a read.

An arm-bike would be easiest. Your gym may have one of these tucked in a corner somewhere http://www.amazon.com/MagneTrainer-ER-Mini-Exercise-Bike-Exerciser/dp/B000V53KD8 just stick it on the table, sit down and get your arms going.

Weight training with your arms would be good too, but think more towards the (boring, CW) small isolated muscle exercises that you can do while sitting.

Move around on the floor and crawl around. Roll in the grass. Do body weight exercises on your back, put your feet up in the air and raise and lower, twirl them around, do scissor motions, etc. See if you can go swimming in a brace so your foot isn't hurt by the drag of the water.

I've seen people in moon boots on raised scooters that they kneel on and push with their good foot.