Physiotherapy · Core

Cross-body reach

Target Obliques  ·  Equipment Body weight  ·  Level Beginner  ·  Reps 2

Cross-body reach is a beginner-level physiotherapy 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. Reach across right2s · ease-in-out Pull the right arm across the chest toward the left shoulder
2. Return1.4s · ease-out Release back to center
3. Reach across left2s · ease-in-out Pull the left arm across the chest toward the right shoulder
4. Center1.4s · ease-out Return to center

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 "Cross-body reach"
  rig humanoid
  pose start = standing

  step "Reach across right" 2s ease-in-out:
    shoulder_right: flex 80
    reach: hand_right shoulder_left
    ground-lock: feet
    cue "Pull the right arm across the chest toward the left shoulder"

  step "Return" 1.4s ease-out:
    shoulder_right: flex 0
    ground-lock: feet
    cue "Release back to center"

  step "Reach across left" 2s ease-in-out:
    shoulder_left: flex 80
    reach: hand_left shoulder_right
    ground-lock: feet
    cue "Pull the left arm across the chest toward the right shoulder"

  step "Center" 1.4s ease-out:
    shoulder_left: flex 0
    ground-lock: feet
    cue "Return to center"

  repeat 2

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