X-Factor @ IMP
What it measures
SportsBox-style X-Factor at IMP—the angular torso–pelvis stretch (degrees) at Impact, conceptually Chest Turn minus Pelvis Turn at the IMP instant. Different from Downswing core speed sequencing ratios (often labeled Speed gain / timing rows). NEVER swap this IMP stretch number for TOP stretch without relabeling the phase.
Units: degrees
Why it matters
Snapshots how much separation survives into strike—a headline metric for kinematic sequencing reviews next to sway/lift columns.
Curated YouTube drill videos
Vector matches drill videos to your focus—contact, shot shape, start line, D-Plane.
Related metrics
X-Factor @ TOP, Chest Turn @ IMP, Pelvis Turn @ IMP, Speed Gain (Pelvis to Chest)