Exercise has helped my shooting alot
I started doing more calesthetics/running this past year, and it has really helped my ability to control handguns, especially in rapid fire. I do alot of wrist strengthening exercises (db curls), as I have rather slender wrists, and now I can shoot relatively heavy weapons with some accuracy, wheras I used to only be able to shoot a Ruger MK II decently (light gun/recoil). What I really think helped my was dry-firing my Smith Highway Patrolman for 15 minutes every night, and sometimes just timing myself to see how long I could hold it extended- it is over 40 oz of steel. I also noticed that rifle and shotgun recoil has started to affect me less, because I have been building up more meat in my shoulders.