This is an old thread, so I am not going to address anyone specific. I just want to say, regardless whether you agree with me or not about NOT squeeze the gun to death in shooting, relax the hands to shoot. The more you fight the recoil, the more you feel.
I never thought it make much difference between shooting like 9mm, 38spc or even 45ACP to 22LR. You just go with the flow. I have been shooting with hands relax as much as possible for years, I was actually surprised to learn people actually hold their gun tight to shoot. Then I hear people complaining about recoil.
Shoot with hand relax works, I am not a great shooter nowhere even close, but I am definitely above average judging by looking at other people's target. I don't shoot 357 magnum that often, but it still doesn't bother me when I shot them. The only one that recoil bother me was 12 gauge shotgun.
I am not trying to change anyone's mind, BUT anyone have problem with their hands that keep them from shooting, have an open mind and give it a try if it is choosing between not shooting OR try shooting with relax hands.
On the subject of exercise the hand, it works. I am 68, all the joints started to hurt, my knees started to buckle two years ago, feet hurts, back, neck..... I stay active, I exercise a lot, about 5 hours a week doing weights and aerobics and stretching. The pain and knee buckling got a lot better. Exercise works, I can easily keep up with people in their 30s and 40s. I can run circles around my two stepsons, I out pushup my 21 years old grandson.......... Just stay active and keep exercise. I still exercise with kick boxing type, punching and kicking on the kicking bags. I even pick up stick fighting lately.
You cannot help getting old, but you don't have to be old and act old.
Peace.