I'm 66, and I'm trying to recover from tearing up my knee falling off my mountain bike...my physical
therapist and I thought that a trike would be good exercise, so I bought a
Sun EZ-3 AX to ride.
It's kind of heavy (about 50 lbs), and kind of expensive (about $1500), but it was working well for me...
much more fun than pedaling a stationary bike while staring at a wall. It has lots of gears with a wide
range, and shifting is easy. Unfortunately, I got to ride only about 20 miles total before it was stolen!