Suzie, I too am a runner in injury recovery. I'm 54 yo, have been running since '94, and have 13 marathons and countless shorter races under my belt.
I've been on the bike for 2 months now and I'm really making it work. I have a competitive spirit and I regularly placed in the top 3 in the races I ran. While biking is non-competitive at this point, I get my highs by going farther and/or faster once or twice a week.
It can be a suitable replacement so listen to the advice of the others and make it work. I have ...