Stride | Henken [Baseball Pitching Lab Japan]

The stride is the motion that begins after the "Stride Down," where the leg raised during the "Leg Lift" steps toward home plate.
In pitching mechanics, it is a crucial movement that significantly affects both velocity and control.

From Stride Down to Stride

During the Stride Down, you lower your center of gravity diagonally forward, eventually transferring your full weight onto the lead leg.
While the movement is diagonally downward during the "Down" phase, it becomes almost a horizontal parallel movement once you transition into the "Stride."
(Since the pitcher's mound is elevated, there is still a slight downward component in reality.)

As mentioned in the Stride Down section, leading the movement with your glutes is commonly called "Hip-First."
Conversely, leading with the upper body (shoulders) is called "Shoulder-First."

In a "Shoulder-First" motion, the upper body tends to lunge forward too far after the lead foot lands, preventing you from utilizing the strength and flexibility of your lower body.
Additionally, some pitchers lead with their foot before the hips or shoulders.

If the upper body leans too far toward second base during the down phase, the foot tends to come out first.
In this case, the hips rotate prematurely as the foot reaches out, causing the "body to open" too early.
This disrupts the timing between the lower and upper body, making it impossible to effectively transfer power from the legs.
It is essential to enter the translational motion "Hip-First" and let the hips lead the forward movement.

Movement of the Lead Leg During the Stride

When transitioning from the Stride Down to the Stride, it is important to fully extend the lead leg.
Extending the leg generates greater centrifugal force during the step, which increases translational energy.

The foot should step straight toward the target, without veering toward the first-base or third-base side.
Once the lead foot lands, your weight shifts to it, and it becomes your new pivot leg.

The angle of the knee upon landing is critical.
If the leg is fully locked at 180 degrees, it acts as a stiff brake.
If the angle is too small (around 90 degrees), the leg cannot support the weight, causing the upper body to collapse forward.
An angle of approximately 120 degrees is ideal; this allows you to firmly catch the translational energy and reflect it into the rotational spin of the upper body.