recovery from metatarsal stress fracture

Question
I am 3 1/2 weeks out from a 2nd metarsal stress fracture.  I was
running between 40-45 miles per week prior to injury.  3 weeks
prior I began running in new shoes.  I also just began training for
the Chicago marathon.  I have been cross training since the injury
and not runing at all.  (cycling, swimming, yoga)  I have been given
the ok to beging running again, but am not sure how to resume so
that I do not re-injure myself.  I need help on a schedule to work
myself safely back to a normal training schedule.
Thanks so much for your help!
Kristi

Answer
Hi Kristi
To properly respond to your questions i need a lot more info In regards to your situation.My first thought is forget  chicago marathon,your not ready.KK course record holder is good friend and trains here all the time.Training for the marathon is serious business and should not taken lightly..Get in touch if you want to talk.

Best to you

John