Step first, then bat. The single heaviest-weighted thing amp measures in a batting action is whether the step is completed before the downswing begins — 8 points of 100 on that one criterion alone. Add a stable base through the downswing, a leading elbow that stays extended, and wrists that unlock late, and you have the sequence that turns body movement into bat speed. Four criteria, 18 points.
What each band looks like
Step Completed Before the Downswing Begins
8 of 100 · filmed side-on
Looks right
Clear visible sequence. Foot lands, brief delay, then the bat starts forward.
Can manage
Foot landing and downswing starting at effectively the same moment.
Needs attention
Bat clearly moving forward before the foot has landed. The base is not set and the stroke is being powered by the arms alone.
Base Stability Through the Downswing
4 of 100 · filmed side or front-on
Looks right
Feet still, knees braced, hips uncoiling off a stable base.
Can manage
Slight foot movement or a soft knee, stroke still controlled.
Needs attention
Feet moving during the downswing, back knee collapsing, no stable base to rotate against.
Leading Elbow Extension Maintained
3 of 100 · filmed side-on
Looks right
Leading elbow stays extended throughout.
Can manage
A slight collapse after contact.
Needs attention
Elbow or wrist breaking before or at contact.
Late Wrist Unlock
3 of 100 · filmed side-on
Looks right
Wrists stay locked through the first part of the downswing and unlock late, immediately prior to impact.
Can manage
A slightly early release that does not cost control.
Needs attention
Wrists rolling or unlocking early in the downswing, bottom hand taking over.
These are the criteria as amp scores them. Reading your own footage against them is free and always will be — what amp adds is doing it the same way every week, so the change between one session and the next is a number rather than an impression. Apply for the pilot.