Education · Core

Spine rotation

Target Obliques  ·  Equipment Body weight  ·  Level Beginner  ·  Reps 3

Spine rotation is a beginner-level education movement targeting the obliques, written in Posecode, a small open-source language that LLMs like ChatGPT, Claude, and Gemini can write to describe human movement as text. Every joint angle below is hard-clamped to a safe range of motion.

How to do it

1. Rotate right2.5s · ease-in-out Rotate the trunk to the right: transverse-plane spinal rotation
2. Rotate left2.5s · ease-in-out Pass through center and rotate to the left
3. Center2s · ease-out Return to a neutral facing

The .posecode source

This is the exact text an LLM writes to produce the animation above: phases and joint angles, not 3D transforms.

posecode stretch "Spine rotation (ROM demo)"
  rig humanoid
  pose start = standing

  step "Rotate right" 2.5s ease-in-out:
    spine: rotate-out 45
    ground-lock: feet
    cue "Rotate the trunk to the right: transverse-plane spinal rotation"

  step "Rotate left" 2.5s ease-in-out:
    spine: rotate-in 45
    ground-lock: feet
    cue "Pass through center and rotate to the left"

  step "Center" 2s ease-out:
    spine: rotate-in 0
    ground-lock: feet
    cue "Return to a neutral facing"

  repeat 3

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