Earlier quoted context omitted.
Part of me really wants to pick up hockey - just for fun, recreationally - but at 40, I'm worried that I'll get injured to the point where I won't be able to do other things I enjoy, like cycling. Hell, I fell off my bike from a stop a few weeks ago, and landed on my knee, and it took a week and a half before I felt like I could trust my leg to hold weight.
I did MMA at 40. Problem is your reflexes just can't keep up with an 18 year old. My knee got blasted by a faint intended to just make me move back because I just couldn't move out of the way as fast as the kid's kick. Whatever you do my advice is if it's high impact join the 'old man's league'. They better understand everyone's limits.
It is a tough sport and one bad day grappling or boxing and I'm in pain for weeks which limits training. It's not a easy sport to do half-way.