How to heal posterior shin splints?

Usually a sign of over training rest is the cure - However, if you had them the first time out I suggest a sport medicine consult to make sure there is no structural issue it can be a knee or even hip not just feet that is causing what should be normal stress to result in an over stress injury. Failing this - track may not be possible for you long term. I am sorry - it is most frustrating for a athlete to be side lined like this