As the club/bat swings through an arc similar to an orbit, perhaps the word 'apoapsis' may suit especially if used in the relationship between the club/bat and the player's head.
http://www.windows.ucar.edu/tour/li...anics/orbit/perihelion_aphelion.html&edu=high
Quote:
Any object in such an orbit has both a perihelion and an aphelion point along its orbit. As determined by Kepler and stated in his Second Law of Planetary Motion, the speed of an object in its orbit is fastest at perihelion and slowest at aphelion.
The terms perihelion and aphelion apply specifically to objects orbiting the Sun. There are similar terms for the closest and furthest points in orbits around other bodies, such as Earth, the Moon, and other planets and stars. The most commonly used are:
Earth - perigee and apogee
Moon - perilune (or periselene) and apolune (or aposelene)
a star - periastron and apastron
Jupiter - perijove and apojove
a generic object - periapsis or apoapsis
Aphelion is derived from the Greek words "apo" (away from) and "helios" (Sun), while perihelion includes the Greek word "peri" (near).
End Quote.
There again, perhaps not...