Fitness · Lower legs

Single-leg calf raise

Target Calves  ·  Equipment Body weight  ·  Level Intermediate  ·  Reps 10

Single-leg calf raise is a intermediate-level fitness movement targeting the calves, 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. Rise1.1s · ease-out Balance on the right foot and rise onto the ball of the foot
2. Lower1.3s · ease-in Lower the right heel slowly under control

The .posecode source

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

posecode exercise "Single-leg calf raise"
  rig humanoid
  pose start = standing

  step "Rise" 1.1s ease-out:
    ankle_right: plantarflex 40
    knee_left: flex 90
    cue "Balance on the right foot and rise onto the ball of the foot"

  step "Lower" 1.3s ease-in:
    ankle_right: plantarflex 0
    knee_left: flex 90
    cue "Lower the right heel slowly under control"

  repeat 10

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