Focus on your body's center point to improve balance
One of the focus options is to place your attention on the center part of your body - the "dantian," a couple of centimeters below your tummy button - during the swing. The speaker says that when players do this, their sense of balance improves because their attention has gone down and they are not so much in their head.
Channel: Mark Immelman
Watch official source at 29:03Why this context matters
Attributed to Peter Ralston's The Principles of Effortless Power.