“Keep your feet still”
Having quiet feet during the swing is becoming less and less common at the highest levels, and that’s because active feet are a great way to generate power. If you can engage your feet properly with the ground during the swing, it’s much easier to hit the ball far. This phenomenon is sometimes called “ground reaction forces,” and it’s one of the key moves that helps players generate power.
“Keep your head still”
If you’ve ever struggled with contact, one of the first pieces of advice the uninformed will offer is to “keep your head down.” The advice comes from a well-intentioned place, and the rationale is solid: If you keep your head down longer you’ll keep your eye on the ball and make better contact. But in practice this advice is flawed. If you keep your head down too long, it will restrict your swing and actually hurt your contact.
Harrington made a video about this very subject several years back, and you can check it out below.
Great stuff:
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