SportsBox Chest Bend (forward/back torso flexion versus model baseline) anchored at TOP. Separate from Chest Side Bend @ TOP (lateral tilt) and Chest Turn (rotation). Contrast Chest Bend @ ADR to quantify how torso pitch evolved from Address through coil completion.
Units: degrees
Why it matters
Explains torso pitch deltas while arms/finish wind—guides posture-loss narratives before transition firing.