{
  "schemaVersion": "1.0.0",
  "exerciseSlug": "hammer-curl",
  "assetId": "hammer-curl-preview-shaos-v2",
  "role": "preview",
  "status": "approved",
  "version": "v2.0.0",
  "reviewedAt": "2026-09-03",
  "source": {
    "canonicalArtwork": "/assets/exercises/hammer-curl/anatomy.webp",
    "sha256": "7828820c174a0f05e536d3a275d27ddd32d23d4f5566d26b0697fe9dd90c273f"
  },
  "production": {
    "method": "Nine identity-preserving key poses registered to one fixed athlete and foot baseline, then arranged into a seamless standard-tempo loop.",
    "highlightCue": "Illustrative ShaOS activation cue; not an EMG measurement.",
    "highlightLegend": {
      "scheme": "primary-secondary",
      "primary": { "label": "Primary muscles", "color": "#D97706", "muscles": ["Biceps"] },
      "secondary": { "label": "Secondary muscles", "color": "#8F969B", "muscles": ["Forearms"] }
    },
    "principle": "Keep a visible orange baseline at rest, build through the curl, peak at the top squeeze, and ease through the controlled lowering phase."
  },
  "playback": { "width": 720, "height": 720, "durationSeconds": 7, "frameRate": 20, "muted": true, "loop": true },
  "files": {
    "preview": { "path": "preview.mp4", "mimeType": "video/mp4", "bytes": 549058, "sha256": "d978973f5f2026a667a9aa597620be10f304dd9b2a5475ab713efd7fbe7271ec" },
    "poster": { "path": "poster.webp", "mimeType": "image/webp", "bytes": 37084, "sha256": "76958e6084ccd61cf30c2c920bcd6c27810a351c6abd43553db42320228b6a30" }
  }
}