Fifty comes in June of this year. The latter part of my forties has changed my training and outlook. I started my Hapkido-Karate training just shy of 35 and graded for my first dan 11 years later.
The big thing is that I don't want to take the hard falls on the mats anymore. My back is prone to stiffening and spasms; my knees were never great to begin with. I tried Systema last year, which takes a very fluid approach to ukemi, but my heart wasn't in it.
About a month ago, I joined a Yoga studio, which I attend three to four times a week. I practised Yoga in my mid-forties, when I was a brown belt, and it helped me a lot.
There's still some MA in my future. One of my sensei, a police officer, has invited me to come help him out with some training he's set up informally for some of his colleagues.