If you have ever watched a baseball game, regardless of the level, you have probably seen on-deck hitters swinging with a weight on the barrel of their baseball bat. This is a donut. Most players utilize a donut to loosen their muscles quickly, while others take full swings with a donut so that their bat feels “lighter” when the donut is taken off.
But does using a donut improve bat speed prior to an at-bat? JustBats.com examines.