Re: Aikido at forty
Without any background in any martial arts, I started when I was 44( I'm 47 now) and I had to get permission from my doctor to train due to my lower back problem. Just relax, take it easy, and know your limitations. I you decide to take the plunge and try it out, voice your concerns to the sensei. As you probably know, there are a few aikido styles. Sample as much as you can then decide which teaching or dojo you want to join.
Oh, in Ki Society style aikido, we have to extend ki all the time so ki training is part of the curriculum.