Speed Gain (Arm to Shaft)
What it measures
Player Plus ratio describing how peak arm kinematics feed shaft rotational kinematics—the final kinematic bridge before mph-based Release Factor summarizes club vs hands.
Units: ratio
Why it matters
Explains downstream shaft deg/sec viability before clubhead peaks realize.
Curated YouTube drill videos
Vector matches drill videos to your focus—contact, shot shape, start line, D-Plane.
Related metrics
Shaft Swing Speed Max, Lead Upper Arm Swing Speed Max, Release: hands to clubhead transfer