I guess I forgot to include bike info in my first post. I ride a 2009 Trek 7.3 Fx. My previous bike was a 2000 Trek Navigator 200. The Navigator helped me get into biking after my injury but it was very slow.
The 7.3 Fx is much better. It has the thin racing tires and better shifters and derailleurs. It also has the upright handlebars which is more comfortable than the racing-style bikes.