{
  "resourceType": "ActivityDefinition",
  "id": "supine-90-90-with-breath",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/supine-90-90-with-breath",
  "version": "1",
  "name": "Supine9090WithBreath",
  "title": "Supine 90-90 with Breath Pacing",
  "status": "draft",
  "experimental": true,
  "description": "Lie supine with hips and knees flexed to 90° (calves on a chair, ottoman, or wall). Place hands on belly. Breathe slow diaphragmatic breaths (~6/min). Optimizes zone of apposition for the diaphragm and provides maximal somatosensory grounding.",
  "useContext": [
    {
      "code": {
        "system": "http://terminology.hl7.org/CodeSystem/usage-context-type",
        "code": "user"
      },
      "valueCodeableConcept": {
        "text": "difficulty: beginner"
      }
    }
  ],
  "topic": [
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "supine-90-90-with-breath",
          "display": "Supine 90-90 with Breath Pacing"
        }
      ]
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "5–10 minutes, 1–2×/day."
    }
  ],
  "usage": "Evidence: moderate.",
  "note": [
    {
      "text": "Low back stays in light contact with the floor — no arching"
    },
    {
      "text": "Belly rises before chest on each inhale"
    }
  ],
  "extension": [
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Diaphragm"
        },
        {
          "url": "role",
          "valueCode": "primary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "5798000"
          }
        }
      ]
    }
  ]
}