{
  "resourceType": "ActivityDefinition",
  "id": "hip-hinge-deadlift",
  "url": "https://bodyiq.dev/fhir/ActivityDefinition/hip-hinge-deadlift",
  "version": "1",
  "name": "HipHingeDeadlift",
  "title": "Hip Hinge / Deadlift Pattern",
  "status": "draft",
  "experimental": true,
  "description": "Standing hip hinge with bodyweight or light load emphasizing posterior chain loading while maintaining neutral spine. RDL produces the greatest peak hamstring force (1.6 BW BFlh, 1.9 BW SM) and greatest peak hamstring stretch among common exercises, exceeding sprinting demands. Eccentric training including RDL reduces hamstring injury by 56.8-70%.",
  "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": "hip-hinge-deadlift",
          "display": "Hip Hinge / Deadlift Pattern"
        }
      ]
    }
  ],
  "bodySite": [
    {
      "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": "knee",
          "display": "Knee"
        },
        {
          "system": "http://snomed.info/sct",
          "code": "129159008",
          "display": "Structure of femorotibial joint"
        }
      ],
      "text": "Knee"
    },
    {
      "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": "3×8-12 reps; 60-80% 1RM for strengthening; bodyweight for learning pattern"
    }
  ],
  "usage": "Evidence: strong. Step-RDL at 80% 1RM: glute max ES=1.70, semitendinosus ES=0.82, erector spinae longissimus ES=2.12 vs standard RDL [Coratella 2022]. Single-leg RDL: glute max 105-169% MVIC, BF 70-122% MVIC [Mo 2023]",
  "note": [
    {
      "text": "Long, neutral spine — hinge lives at the hip",
      "authorString": "focus:internal"
    },
    {
      "text": "Push the hips back like closing a car door with the butt",
      "authorString": "focus:external"
    },
    {
      "text": "Drag the bar up the legs to standing",
      "authorString": "focus:external"
    },
    {
      "text": "Head, hips, and heels stay on three parallel rails",
      "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": "Progress the mastered bilateral hinge to a bench-supported single-leg hinge.",
      "display": "Single Leg Hip Hinge with Bench",
      "resource": "ActivityDefinition/single-leg-hip-hinge-bench"
    }
  ],
  "extension": [
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Gluteus Maximus"
        },
        {
          "url": "role",
          "valueCode": "primary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "206007"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Hamstrings (Group)"
        },
        {
          "url": "role",
          "valueCode": "primary"
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Erector Spinae Group"
        },
        {
          "url": "role",
          "valueCode": "secondary"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "44947003"
          }
        }
      ]
    },
    {
      "url": "https://bodyiq.dev/fhir/StructureDefinition/muscle-involvement",
      "extension": [
        {
          "url": "muscle",
          "valueString": "Transversus Abdominis"
        },
        {
          "url": "role",
          "valueCode": "stabilizer"
        },
        {
          "url": "coding",
          "valueCoding": {
            "system": "http://snomed.info/sct",
            "code": "86493009"
          }
        }
      ]
    }
  ]
}