Don’t think smiling can help lower your scores? You are mistaken, my friend. So turn that frown upside down and bring down your handicap. Or at very least your blood pressure while on the golf course.
Your physiology (body) can dictate your psychology (mind), which can in turn dictate your physiology (your game).
Hunter Mahan has talked about his quest for qualifying for the 2007 US Open and how his caddie and mental coach, Neale Smith, ordered him to react enthusiastically after every shot.
This video will give you some insight into this whole smiling business, or at the very least make you smile.