A strong body makes the mind strong. As to the species of exercises,

A strong body makes the mind strong. As to the species of exercises, I
advise the gun. While this gives moderate exercise to the body, it gives
boldness, enterprise and independence to the mind. Games played with the
ball and others of that nature, are too violent for the body and stamp no
character on the mind. Let your gun, therefore, be the constant companion
of your walks.
-- Thomas Jefferson
-- Encyclopedia of Thomas Jefferson, 318 (Foley, Ed. reissued 1967)