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The K-Vest generates data in digital form that gives us great flexibility in learning what it tells us about your swing. We like visuals, and manipulating a mesh outline of a swing allows us to focus on particular traits of importance. Analysis of the top of the backswing shows the amount of rotation of both upper body and lower body, and the amount of separation (K-angle) between the two body segments. The angle of separation is a good indicator of the amount of power that can be transferred to the club through the downswing in a good kinematic sequence. The top down front view shown below makes it easy to see the angle of separation, also known as the X-Factor. Other views offer additional perspectives.

Here are animation mesh illustrations for three different junior girls showing the wide range of backswing rotation (turn) that we have seen. The numbers in green are LPGA tour player averages. Bend indicates forward bend (flexion). Side bend numbers indicate the amount of lateral tilt in each body segment. K-angle (upper body turn minus pelvis turn) is the amount of separation between the two body segments.

We see a range of ~50 degrees in the amount of backswing rotation comparing optimal full rotation (top panel) with over-rotation (middle panel) and under-rotation (lower panel). It's notable that the greatest amount of upper body rotation did not produce the greatest amount of separation from the lower body. 

In our swing analysis review, we discuss the implications of the data with regards to the club performance we see, possibilities for improvement, and potential for injury. TPI functional movement tests are a valuable part of the picture. Knowing your swing mechanics and range of motion helps you and your coach to design an effective strategy for improving your game.