A measurement reflecting the efficiency of energy transfer from the club to the golf ball during impact. It is calculated by dividing ball speed by clubhead speed. A higher value indicates a more efficient transfer of energy, resulting in greater distance for a given swing speed. For instance, a value of 1.5 signifies that the ball is traveling 1.5 times faster than the clubhead speed at impact.
This metric is crucial for optimizing performance in golf. By understanding and improving the efficiency of energy transfer, golfers can achieve longer distances and greater consistency. Historically, its evaluation has relied on sophisticated launch monitor technology, providing detailed insights into the dynamics of the golf swing and impact conditions. This data allows for precise adjustments to equipment and technique.