I'm 30. I got sloppy over xmas with the exercises but the physio says get used to them because i'll be doing them every day or whatever for the rest of my life, such is my tendancey to run with the wrong muscles. I'm 4 months into this too.
Gym work is something i can do regularly and without irritation too, physio says to do leg presses rather than squats with weight on, one leg at a time cos if you do both at once you'll always use one more than the other. I'm doing hip adduction on the machine, and abduction like southernsoftie suggested by tieing a theraband around my ankles and walking up and down the gym sideways. I've also been doing a lot of work on a BOSU ball so help improve my general stability. If i can get a few AM races done this summer i'll be happy.