Golf Tip Get Connected - Ball Between the Arms Drill —
Andy Hilts, PGA-GolfTec

Creating a connection between the turn of your shoulders
and swing of your arms promotes a more efficient golf
swing with less moving parts. Most amateurs' swings have
too many moving parts and as a result develop a great deal
of inconsistency. To improve the connection in your swing
I recommend The Ball Drill. Find a ball about the size of
a slightly deflated volleyball and pinch the ball between
both biceps while also having it contact your chest. Once
the ball is in place, grip the club and begin to make
short swings. Gradually work your way up to a full-length
swing while swinging slowly. The key to performing the
ball drill is that the ball must maintain contact with all
three points while you are swinging. The length of your
back swing may feel shorter and more restricted.
Connecting the motion of the body and arms will
eliminate unnecessary moving parts in your golf swing and
make it easier to repeat.