Ken Griffey jr., The Golden Ratio and The Perfect Batting Stance
By Ken Cherryhomes
If we imagine a line from the center of his head to the ground, we can delineate these proportions into two segments.
Ken is in a perfectly balanced position here, despite the appearance of asymmetry, his trunk (center of mass) being off center. The concept of balance in biomechanics in sports, doesn’t necessarily equate to perfect symmetry. Balance is about ensuring stability and control, particularly in dynamic situations like swinging a bat. The batter’s positioning allows him to leverage his body’s kinetic chain most efficiently.
While the trunk, which houses the majority of the body’s mass might appear off-center, it’s in a prime position to provide stability. The position of the CoM is critical for maintaining balance, especially as the batter prepares to swing and transfer weight.
His Base of Support, the distance between his feet provides a stable foundation. A broader base ensures greater stability, allowing the batter to shift more weight rapidly without losing balance.
As mentioned, the weight is distributed 55% back and 45% forward. This positioning primes the batter to generate power from the back leg (stored energy) and then transfer it efficiently through the swing, utilizing the forward leg as a pivot.
The stance also sets up the batter for optimal rotational energy. As the swing initiates, the energy stored in the back leg (55% segment) transfers through the hips and trunk, utilizing the torque generated by the rotation. The asymmetrical positioning aids in creating a more forceful and controlled swing.
The asymmetry in his stance is purposeful and strategic. It allows him to maintain balance, generate significant power, and maintain control throughout his swing. The understanding and application of these biomechanical principles are vital for maximizing hitting efficiency and power in baseball.