{
  "resourceType": "ActivityDefinition",
  "id": "side-plank",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/side-plank",
  "version": "1",
  "name": "SidePlank",
  "title": "Side Plank (Lateral Bridge)",
  "status": "draft",
  "experimental": true,
  "description": "Sidelying forearm plank for lateral core stability. Produces high quadratus lumborum activation (121.62% MVIC) and gluteus medius activation (66.67% MVIC). Rotational side-bridge variant: RA 43.9%, EO 62.8%, glute med >69% MVIC. May not be well-tolerated in acute LBP patients.",
  "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": "side-plank",
          "display": "Side Plank (Lateral Bridge)"
        }
      ]
    }
  ],
  "bodySite": [
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "thoracic-spine",
          "display": "Thoracic Spine"
        },
        {
          "system": "http://snomed.info/sct",
          "code": "5261000",
          "display": "Structure of thoracic intervertebral disc"
        }
      ],
      "text": "Thoracic Spine"
    },
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "hip",
          "display": "Hip"
        },
        {
          "system": "http://snomed.info/sct",
          "code": "24136001",
          "display": "Structure of hip joint"
        }
      ],
      "text": "Hip"
    },
    {
      "coding": [
        {
          "system": "https://bodyiq.dev/fhir/CodeSystem/exercise",
          "code": "lumbar-spine",
          "display": "Lumbar Spine"
        },
        {
          "system": "http://snomed.info/sct",
          "code": "23526008",
          "display": "Structure of lumbar intervertebral disc"
        }
      ],
      "text": "Lumbar Spine"
    }
  ],
  "kind": "ServiceRequest",
  "dosage": [
    {
      "text": "3×15-30 second holds per side, progress to 45-60 seconds; 2-3x/week"
    }
  ],
  "usage": "Evidence: strong. QL 121.62% MVIC, glute med 66.67% MVIC [Nam 2025]. Rotational variant: EO 62.8%, RA 43.9%, glute med >69% [Youdas 2014]",
  "note": [
    {
      "text": "Stack ribs over hips — long line head to heel",
      "authorString": "focus:internal"
    },
    {
      "text": "Drive the down elbow into the floor",
      "authorString": "focus:external"
    },
    {
      "text": "Reach the top hip toward the ceiling",
      "authorString": "focus:external"
    },
    {
      "text": "Trace a straight broomstick down your side",
      "authorString": "focus:imagery"
    }
  ],
  "relatedArtifact": [
    {
      "type": "citation",
      "label": "kisner-therapeutic-2017",
      "citation": "Kisner C, Colby LA, Borstad J. (2017). Therapeutic Exercise: Foundations and Techniques"
    },
    {
      "type": "citation",
      "label": "acsm-guidelines-2021",
      "citation": "American College of Sports Medicine. (2021). ACSM's Guidelines for Exercise Testing and Prescription",
      "document": {
        "url": "https://doi.org/10.4135/9781412994149.n165"
      }
    },
    {
      "type": "successor",
      "label": "Can hold a full side plank ~30s with a level pelvis (no hip drop) before adding top-leg abduction",
      "display": "Side Plank with Hip Abduction",
      "resource": "ActivityDefinition/side-plank-hip-abduction"
    }
  ],
  "extension": [
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Quadratus Lumborum"
        },
        {
          "url": "role",
          "valueCode": "primary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "6001004"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "External Oblique"
        },
        {
          "url": "role",
          "valueCode": "primary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "1179024003"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Gluteus Medius"
        },
        {
          "url": "role",
          "valueCode": "secondary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "78333006"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Internal Oblique"
        },
        {
          "url": "role",
          "valueCode": "secondary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "1179024003"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Erector Spinae Group"
        },
        {
          "url": "role",
          "valueCode": "stabilizer"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "44947003"
          }
        }
      ]
    }
  ]
}