X Factor Swing
X-Factor is the amount of coil at the top of back swing and is the difference between shoulder turn and hip turn, e.g. 90 degrees of shoulder turn and 50 degrees of hip (pelvis) turn equals a 40 degree X-Factor. TPI Tour average for X-Factor at pelvis transition is about 42 degrees.
X-Factor Stretch is the maximum increase in the X-Factor due to the pelvis starting the downswing before the shoulders. X-Factor Stretch equals maximum X-Factor during downswing minus X-Factor when hips begin the downswing, e.g. 45 - 40 = 5 degrees of stretch. TPI Tour average for X-Factor Stretch is about 5 degrees.