One thing that goes with age, that most people don't take into account is flexibility. I always tell them to try yoga or stretch on a regular basis. It'll increase balance, coordination, stamina and speed. You can be strong as hell, but if you can't tag your opponent, they will whittle you down.
Don't get too good at fighting. Could cause you to get shot.
Even the Black Arts people advocate this philosophy.
Seconding these, but Jiu Jitsu in particular. Where I was raised one needed to be able to defend oneself. My brother and I enrolled @ the Chicago Institute of Jiu Jitsu as boys (he was 9, I was 10), where we studied/practiced -- and competed -- for 7-8 years (7 for me). After university, I was back @ MA in the Army, again Jiu Jitsu / Judo ... US SOG were not yet @ KM @ the late 1970s. Used a/or practiced almost daily for nine years, then set away in a closet for about a decade till I took it out, dusted it off, and renewed daily practice in (circa) 2002. I'm in a club here, in France, @ which I instruct experienced teens~young adults in the stuff. It'sa lotta fun but I prefer powerlifting.
Anyway, J-J is darned good stuff "for the streets" get my meaning.
Me and my buddy went to the Chicago Judo & Karate Center in Hammond, IN in 69-70. It was a chain of schools run by Jim Koncevic. He got into a dispute with another dojo and got run through with a sword.
We never went back.
https://chicagoreader.com/news-politics/the-life-and-death-of-the-deadliest-man-alive/
Me and my buddy went to the Chicago Judo & Karate Center in Hammond, IN in 69-70. It was a chain of schools run by Jim Koncevic. He got into a dispute with another dojo and got run through with a sword.
We never went back.
https://chicagoreader.com/news-politics/the-life-and-death-of-the-deadliest-man-alive/
Me and my buddy went to the Chicago Judo & Karate Center in Hammond, IN in 69-70. It was a chain of schools run by Jim Koncevic. He got into a dispute with another dojo and got run through with a sword.
We never went back.
https://chicagoreader.com/news-politics/the-life-and-death-of-the-deadliest-man-alive/
Me and my buddy went to the Chicago Judo & Karate Center in Hammond, IN in 69-70. It was a chain of schools run by Jim Koncevic. He got into a dispute with another dojo and got run through with a sword.
We never went back.
https://chicagoreader.com/news-politics/the-life-and-death-of-the-deadliest-man-alive/

We be talkin' of wizards, magicians, necromancers 'n such?
My wife has been saying she wants to start a stretching regiment together.
No personal experience, but my 17yo daughter is a black belt in Kempo karate. I see a lot of older people in her studio and I've actually been thinking about it myself.
I'd have to plump for Krav Maga. Simple techniques, core strength. It's pretty brutal, but it's effective, and you're still young enough to endure the training.
Find a good school, and ask what their lineage is. It should start with Imi, then Darren. There are a lot of places that claim to teach Krav, but they've just picked up a smattering and are not strictly qualified.
I had to quit because I got too old and fragile and arthritic, but it started me on a habit of working out that I still haven't given up, even at age 70.
B.
Always glad to hear when young women train to defend themselves.