My brother did that for this past Goofy challenge. He didn't begin training for the Goofy until around Nov. His reasons were not injury just time restraints which was a poor excuse.
At anyrate, he was fine for the half...walked it. The full was a different story. He was mentally out of it only a few miles into it. He walked it in many hours. He crossed the finish line in pain, both physical and mental...he had knee problems and only wrapped his knee in an ace bandage. He didn't drink enough water because his head was down the whole way. Later that day he didn't want to go to the MK with us and instead went to bed (ok I got that part). Overall he said he was so miserable
Most of his misery came from his own self not preparing. First, I told him to come to these boards for advise and he didn't because he had done two marathons before (though not a Goofy). He has a bum knee (as I do) yet forgot to bring and then buy a knee band...so he bought an ace bandage...wrapped it too tight and cut blood supply.
Mostly though was mental. He had decided early on that he wasn't going to enjoy the race and he didn't.
I must reread your op but how long has it been since you did anything? I would say it depend on that...how long you have been out of commission.
Take it easy, take it slow. Don't try to do too much too soon to catch up that will make it worse (been there done that).
I think you will do fine if you walk it and accept the fact that you could be swept...but you tried. Don't over do it , its not worth it.
As for my brother, he is doing the same training he did last year...which is pissing me off.
