I messed with a gripmaster 10 years or so ago in the card on the way to work usually. It's in a box somewhere here.

It seemed to make my fingers tighter and harder to play fast.

Fast twitch muscles may not do well all bulked up.

I know that my legs are always tight from riding mountain bikes and road bikes.

Stretching seems to be a must to help tight muscles.

I do finger stretches when I remember. :)