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