Some new neuroscience research has show that some good old wisdom is right on the mark about what we now call the self regulatory muscles. When you are working out you are doing reps over and over and over again, you are sensitive to the fact that those muscles cells weaken and at some point you can not perform the way you once did. The same thing is true of your mental muscle or of your mental energy. For golfers the point here is to use your self regulatory muscle properly and use it briefly to focus around your shots very well and then take a vacation, take a break and then do it again. To exercise self control or self regulation has a tremendous energy cost, a tremendous metabolic energy cost and we have shown that in research using PET scans and functional MRI scans that the old fashion concept of mental energy going before physical energy goes is the case. So be careful how you use your mental energy. Focus around your shots and take care of yourself on the golf course.