I find that light weight lifting at the gym is good for me. I have never been able to keep up or make it through an aerobic class or to make it more that 5 minutes on a treadmill, but I can lift a weight 10 reps and then rest for a minute. I worked with a personal trainer for a few months to learn different exercises and the proper posture for workouts. A workout that would take someone else a half hour, usually takes me an hour, but I get a great workout and my muscles are toned. I also like the easy yoga classes.