Hi Patti:
PERSONAL TRAINER: In fact, Jan (my wife) and I hired a trainer in 2012 ( we were 62 and 60, respectively, at the time). Whatever your local trainers cost, it will be WELL worth the cost in terms of prevented injuries. And we just went once a month for 6 months
AEROBCIS WITH A GOOD TEACHER: now, this may be hard to find. I lived in NY City for 30 years, and I have to say, I never came across such a good exercise teacher as Marta, our aerobics teacher at the local YWCA. She had been a dancer as a child and teen, so she knew a LOT about how to move without injuring the body. Short of that, again, I'd go with a personal trainer.
MASSAGE: If you can afford it, do a 90 minute massage once a month (even once every two months if you need to due to price) I would say that the closer I get to 70, the more I can see even if I do EVERYTHING right, the massage is indispensable
PHYSICAL THERAPY: Our insurance paid for this for 2 months. It was invaluable. I started a kettle bell routine last September, and typically, started with 25 lbs, next week 35, the next week 45, and was flipping it all around doing some of the most potentially dangerous moves. Sure enough got a VERY bad case of tennis elbow which by last February I was convinced would never heal. The therapist had me do a few exercises and it was almost all better within a month. can't recommend it enough.
STRETCHING: REALLY tough one. Different effects on women and men, I think. I've done hatha yoga on and off for decades, and i find still the static stretching, holding a position, just doesn't do much, or makes me tighter. I have put together in recent years some of my favorite "dynamic stretches (it's basically what you see in Qigong videos, though I don't find them quite intense enough). It's pretty much what you see anywhere online for athletes to do warmups. I LOVE these stretches and take at least half a dozen 2 minute breaks all day (working at home) which are ENORMOUSLY helpful.
So, lots more possibilities. Don't give up!!! 64 sounds very young to me:>))) There's always the possibility of healing (oh, hot baths work wonders for tension, but some people don't respond to them well - I use basic Epsom salts in the water, the kind you get at CVS or Walgreens).'