What is Body Rotation?

In a softball swing, the resultant Bat Speed is a combination of both body and bat rotations. Blast uses an advanced algorithm model that allows us to measure the contributions of both body and bat rotations from the sensor attached to the bat. This allows the ability to analyze connection in the swing by comparing the contributions of both body and bat rotations once the hitter has committed to the swing by unhinging their wrists. The Body Rotation is expressed as the ratio of Body Rotation to total rotation during this time.