I also had a tibial stress fracture last year – it was quite an unusual one and took just under a year to heal so I understand your worries. I kept up with hot yoga throughout and found that it really helped to keep every other muscle in my leg to function properly – this is EXTREMELY important in your recovery process. Trust me, I am still having major issues because I didn’t keep up my rehab as I should have.
[strong]Long story short, if it hurts – stop.[/strong] There will be some poses that don’t bother you at all, others will. The main idea (as advised by my 2 sports physicians) is to do as much non-impact exercise as possible, but with a stress fracture it is important that you don’t aggravate it. Just find the fine line between rehab-ing the injury and aggravating it.