Physiotherapy · Neck

Neck rotation

Target Neck  ·  Equipment Body weight  ·  Level Beginner  ·  Reps 4

Neck rotation is a beginner-level physiotherapy movement targeting the neck, 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. Look right2s · ease-in-out Turn slowly to look over the right shoulder
2. Look left2.4s · ease-in-out Pass through center and turn to the left
3. Center1.6s · ease-out Return the head to neutral

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 "Neck rotation"
  rig humanoid
  pose start = standing

  step "Look right" 2s ease-in-out:
    neck: rotate-out 60
    ground-lock: feet
    cue "Turn slowly to look over the right shoulder"

  step "Look left" 2.4s ease-in-out:
    neck: rotate-in 60
    ground-lock: feet
    cue "Pass through center and turn to the left"

  step "Center" 1.6s ease-out:
    neck: rotate-in 0
    ground-lock: feet
    cue "Return the head to neutral"

  repeat 4

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