I should imagine any exercise is good for old people since the majority do next no physical activity. But I doubt there’s anything special about MA training when compared to rowing, swimming or gymnastics and they’re much less likely to injure themselves when pulling on a pole in a scull.
Have you ever see those fitness gurus, on morning TV showing exercises like raising your hands above your head or side stepping to music? I often think ‘what’s the point of doing so little exercise’ and then remember they’re catering for the old, infirm and hugely obese.
One of my personal moments of enlightenment:
I was helping sifu run a gym class full of geriatric types, basic static Qigong. Other than sifu I was the youngest person in the room by at least 40 years.
So imagine me in the corner of this group, in my early 30's, Shaolin kung fu disciple, able to hold a lot of these positions no problem for hours.
While the group is trying to keep arms extended and straight (not easy for any of them), sifu turns his attention to me, walks over, and says
" look up "
I hold the qigong pose and raise my face straight up, feeling a slight stretch in my neck, but otherwise effortless.
Sifu says:
"Now look around you".
That's when I notice every single other person in the room is hunched over. As straight as they are trying to make their limbs, years of bad posture and lack of exercise has made them unable to do simple things, like stand up fully straight and look up at the sky.
Sifu says:
"Do you see it? None of them can look up anymore. But it's not too late for you!"
Sifu walks off laughing, knowing I got the point.
To this day, simple standing straight and looking up is part of my "don't be old when you're old" regimen.
Just ask yourself when was the last time you looked straight up like that? You'll be surprised how seldom it is.