In Baseball, Head-First Slides Are Best

Seattle Mariners' Luis Valbuena, right, slides into third base as Oakland Athletics' Daric Barton waits for the ball in the ninth inning of a baseball game Saturday, Sept. 20, 2008, in Oakland, Calif. Valbuena was called out. Credit: AP Photo/Ben Margot

From Live Science:

A player's slide to beat the throw at home plate is one of baseball's big thrills, especially during the postseason, which begins today. But of the two sliding styles — head-first and feet-first — which is faster?

Head-first, says David A. Peters of Washington University in St. Louis, an engineer and avid baseball fan.

The reasons that it's faster to lead off with your noggin all have to do with physics, Peters said.

Specifically, it's a matter of the player's center of gravity (or center of mass) — essentially the point where gravity exerts its tug. For most people, their center of gravity is right around the stomach area, Peters said.

Whenever you leave the ground, no matter which end of your body you lead with, your center of gravity will move forward with the speed (and momentum) you left the ground with, Peters explained.

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