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 capable language models can use to describe human movement as text. Authored joint targets and reach-IK solves are constrained to Posecode's configured per-axis bounds. Those bounds constrain the visualization, but they do not certify that a complete movement is safe or clinically correct. This page documents a code example; it is not exercise instruction.

Movement phases

Phase cues are display-only coaching text. The executable joint and contact directives in the source below determine the animation.

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

The .posecode source

This is the exact text used by the linked playground animation: phases and joint angles, not 3D transforms.

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

  step "Rotate right" 2.5s flow:
    spine: twist-right 45
    ground-lock: feet
    cue "Rotate the trunk to the right: transverse-plane spinal rotation"

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

  step "Center" 2s settle:
    spine: twist-left 0
    ground-lock: feet
    cue "Return to a neutral facing"

  repeat 3

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