{
  "resourceType": "ActivityDefinition",
  "id": "foam-pad-sensory-perturbation",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/foam-pad-sensory-perturbation",
  "version": "1",
  "name": "FoamPadSensoryPerturbation",
  "title": "Foam Pad Balance with Sensory Perturbation",
  "status": "draft",
  "experimental": true,
  "description": "Stand on a compliant foam surface and progressively manipulate visual input (eyes open → eyes closed → busy visual background) and base of support (Romberg → tandem → single-leg). Trains the somatosensory-vestibular-visual balance system.",
  "useContext": [
    {
      "code": {
        "system": "http://terminology.hl7.org/CodeSystem/usage-context-type",
        "code": "user"
      },
      "valueCodeableConcept": {
        "text": "difficulty: intermediate"
      }
    }
  ],
  "topic": [
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "foam-pad-sensory-perturbation",
          "display": "Foam Pad Balance with Sensory Perturbation"
        }
      ]
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "30–60 seconds per condition, 3–5 conditions, 1–2×/day."
    }
  ],
  "usage": "Evidence: strong.",
  "note": [
    {
      "text": "Stand near a wall or counter for safety — fall risk increases with eyes closed"
    },
    {
      "text": "Hold each condition until balance feels easy, then progress"
    }
  ]
}