What does K-Vest Do?
K-Vest measures the Kinematic Sequence of the player along with tracking body positions at every point in the swing, highlighting positions and rotational velocities at heel strike, first move, and contact. With these metrics, we are able to measure the sequence, rotational speed and pinpoint a hitter’s body position in space. K-Vest uses four sensors to measure the rotational velocities of the hip, torso, lead arm, and bottom hand. The sensors are placed on the tailbone, top of the thoracic spine, above the elbow on the lead arm and back of the lead hand.
How Do We K-Vest?
The Efficiency Report is based on the measurements taken during the player’s swing. A graph is produced that tracks the rotational speeds of each swing segment, along with the time in which each segment reaches its peak velocity.
In the graph displayed on the efficiency report, we can see four different colored lines representing the trajectories of speed for each segment of the swing. The red line represents the hips, green represents the torso, blue represents the lead arm and brown represents the hand. (It is important to distinguish the last segment as hand speed rather than bat speed, keeping in mind that K-Vest measures kinematics rather than bat motion.)
Once the metrics from the efficiency graph can be read proficiently, swing strengths and weaknesses become more glaring. Knowledge on a hitter's rotational velocities and swing sequence can be the missing link for a coach who is armed with other data, video or from simply the eye test from watching a hitter take consistent at-bats. Understanding the kinematic sequence and how to read a K-Vest efficiency graph will provide answers unable to be measured before.