{
  "resourceType": "ActivityDefinition",
  "id": "tennis-ball-foot-roll",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/tennis-ball-foot-roll",
  "version": "1",
  "name": "TennisBallFootRoll",
  "title": "Tennis Ball Foot Roll",
  "status": "draft",
  "experimental": true,
  "description": "Place a tennis ball under the bare foot. Roll slowly along the arch from heel to forefoot, lingering on tender spots. Self-mobilizes plantar fascia + foot intrinsics.",
  "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": "tennis-ball-foot-roll",
          "display": "Tennis Ball Foot Roll"
        }
      ]
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "60 s each foot."
    }
  ],
  "usage": "Evidence: moderate.",
  "note": [
    {
      "text": "Moderate pressure — uncomfortable, not painful"
    },
    {
      "text": "Pause 5–10 s on the most tender spots"
    }
  ]
}