Dexterity, flexibility, strength are vital assets in hands required to execute precise and consistent actions. The adverse effects of age, vascular steal and nerve degeneration can be slowed or reversed by consistent hand exercises. (My earlier post) https://forums.homedialysis.org/t/vascular-steal-stealing-some-back/5390/2
The emphasis there was on strength and improving circulation. In the images below I've added some to improve dexterity and flexibility.