Matt,

It took me 1.5 years before he was able to return to the gym and another year before I was really up and running.

I still need to monitor my cardio levels, I can't get on the high aerobic end for extended periods without headaches. All in all I am quite happy with my fitness at this time.

There was a full 1.5 years that I couldn't walk 500 feet without a lot of symptoms knocking me down for hours...drove me nuts. I would try and if it was to much I waited for a couple of weeks and tried again.

I am 58 and been a runner since I was 15 but found I was able to swim several months before I could run..I still have to run on an inclined treadmill to avoid headaches but I can!!

Don't rush but don't quit experimenting.

Bud