Education · Upper legs

Hip flexion

Target Hip flexors  ·  Equipment Body weight  ·  Level Beginner  ·  Reps 4

Hip flexion is a beginner-level education movement targeting the hip flexors, 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. Lift2.5s · ease-in-out Raise the straight right leg forward: sagittal-plane hip flexion
2. Lower2.5s · ease-in-out Lower the leg back under the hip

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 "Hip flexion (ROM demo)"
  rig humanoid
  pose start = standing

  step "Lift" 2.5s ease-in-out:
    hip_right: flex 90
    cue "Raise the straight right leg forward: sagittal-plane hip flexion"

  step "Lower" 2.5s ease-in-out:
    hip_right: flex 0
    cue "Lower the leg back under the hip"

  repeat 4

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