I've suddenly got a bee in my bonnet about returning to martial arts at the age of 50 - my knees are also not great. Kneeling on floors would be highly uncomfortable for me. So, I have 2 styles to choose from - Uechi Ryu and Shotokan. I like the look of the Uechi Ryu style but I am concerned that its more about conditioning than anything else. It's the self defence aspect that I am interested in. What do you think? Should I even be considering karate at my age?