{
  "name": "Glute Bridge",
  "primary": 2,
  "working": ["leg_r", "leg_l"],
  "frames": [
    {
      "hold": 0.4, "tween": 0.8,
      "root": {"pos": [168, 144], "pitch": -90},
      "spine": [0, 0],
      "neck": 20, "head": -6,
      "shoulder_r": -4, "elbow_r": 0,
      "shoulder_l": -4, "elbow_l": 0,
      "hip_r": 72, "knee_r": 82, "ankle_r": 5,
      "hip_l": 72, "knee_l": 82, "ankle_l": 5,
      "pins": {"foot_r": [205, 148], "foot_l": [209, 150]}
    },
    {
      "hold": 0.9, "tween": 1.0,
      "root": {"pos": [172, 116], "pitch": -110},
      "spine": [0, -4],
      "neck": 48, "head": -6,
      "shoulder_r": -14, "elbow_r": 0,
      "shoulder_l": -14, "elbow_l": 0,
      "hip_r": 16, "knee_r": 92, "ankle_r": 5,
      "hip_l": 16, "knee_l": 92, "ankle_l": 5,
      "pins": {"foot_r": [205, 148], "foot_l": [209, 150]}
    }
  ]
}