{
  "schemaVersion": "1.0.0",
  "exerciseSlug": "rear-delt-fly",
  "assetId": "rear-delt-fly-preview-shaos-v1",
  "role": "preview",
  "status": "approved",
  "version": "v1.0.0",
  "reviewedAt": "2026-09-03",
  "source": {
    "canonicalArtwork": "/assets/exercises/rear-delt-fly/anatomy.webp",
    "sha256": "a7fd3fe30ad4e7dc5fa9886d7e345c909022719935780d510fc5a0384ea3b360"
  },
  "production": {
    "method": "Identity-preserving key poses registered to a fixed athlete, foot baseline, dumbbells, and canvas, 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": ["Rear Shoulders"] },
      "secondary": { "label": "Secondary muscles", "color": "#8F969B", "muscles": ["Upper Back", "Traps"] }
    },
    "principle": "Keep the rear-shoulder cue visible at the bottom, build through arm opening, peak at the top, and ease through controlled lowering."
  },
  "playback": { "width": 720, "height": 720, "durationSeconds": 6.15, "frameRate": 20, "muted": true, "loop": true },
  "files": {
    "preview": { "path": "preview.mp4", "mimeType": "video/mp4", "bytes": 344933, "sha256": "dde31c440b936000575b8ce6c1a506ef67a8b39a2122cd5497fe5d1813d4f160" },
    "poster": { "path": "poster.webp", "mimeType": "image/webp", "bytes": 26212, "sha256": "58565a0c749ec999058234c46fc80107ce81e030f38d8609d5b436f2569caf20" }
  }
}