I really enjoy Judo, but over the last ten months I've had a string of injuries. I was out with a bad cold, went back and injured myself and thought about what I was doing. Two months with a cracked rib. Three months with a cranked elbow. Six months of various shoulder injuries. I'm actually less flexible now than when I started.
I decided that the fun was probably not worth the reduction in health. Maybe if I were younger.