I'm 65. I agree... Old age is not for sissies. Just keep thinking about doing what you want or need to do.

Gyms can do a lot of harm, remember they are a business trying to sell a product, and nobody ever got rich by trying to sell less of their product. They will always try to give you more exercise than is good for you, BECAUSE YOU ARE PAYING THEM FOR IT.

Have an active life and get a garden or a horse, or help someone else with theirs.

I can't exercise until it hurts like hell. Takes to long to recover and even longer to get back in the gym.

At 62 this inert couch potato decided to take up with a personal trainer once a week with a program of 150 minutes of cardio in the intervening days. He's this guy who could bench press twice my weight, and he's big on stretching. He always spends the last 10 minutes of our session twisting me in pretzels. That's actually the hardest part. My body was incredibly tight at first. But this is important to minimize discomfort and improve recovery times.

Long story short, because I was in such terrible shape, it was a hellscape of misery the first couple of weeks but has improved rapidly.

I have joint damage from a long bout of Lyme disease in my past; I don't think I'll ever be pain-free. But the pain from exercise can be greatly mitigated. The whole "no pain, no gain" thing is true so far as it goes but if you can't find a sweet spot where you get something positive from exercise then you're probably getting bad advice on how to approach it. Probably from a friend with a higher pain threshold and/or better endorphin responses. Everyone's different.

Also I get a kick out of my trainer because as we go through the gym doing our thing he sees so much cringe-inducing bad form. He tells me people are just hurting themselves because they don't know what they're doing. Especially weight lifters, but really, most people are either not challenging themselves enough in the right ways or are actually inflicting injuries on themselves. It's an effort for a professional not to intervene and correct people.

If you aren't much of a gym rat like me and can afford it I highly recommend at least a few weeks with a good trainer to show you the ropes and establish a routine that works for you. If they're a good trainer they will listen without judgment and work out something where you can experience small successes and be motivated.

i have a mini-trampoline (rebounder) on which i jog in place while holding a 10 lb weight in each hand. 10 lbs isn't much but the effect of resistance & push actually increases it considerably. i think it helps b/c i still get the golf ball out far enough to reach most par 4s.
sometimes i just listen to some music & do some semi-spastic moves to the music.

Is evercise anything like jazzercise?

Stop eversising immediately and seek help

Pilates, Tai Chi ?

Fucked if ya do, fucked if ya don't.