In one non limiting embodiment, {HEAD ~ the swing training device} can be used by {TAIL ~ the golfer} to ensure that he or she stands the correct distance from the golf ball at address 
In one non limiting embodiment , { HEAD ~ the swing training device } can be used by { TAIL ~ the golfer } to ensure that he or she stands the correct distance from the golf ball at address
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH