📖 Static demo — read-only snapshot

You’re browsing a static build of the Body IQ knowledge graph, so everything loads with no backend. A few things that need the live server are turned off here:

  • Global search (sidebar) is disabled — it queries the API.
  • The JSON API and the API “Try it” playgroundaren’t included.
  • The data is a snapshot — it refreshes only when the demo is rebuilt, not live from the database.

Everything else — the body map, progression ladders, coverage heatmap, exercise finder, and all anatomy/exercise/source pages — works fully. The full app (live search + API + database) runs from the source on GitHub.

Infraspinatus

Rotator cuff muscle on the posterior scapula. Primary external rotator of the shoulder.

Draft95%

Anatomy

Origin
Infraspinous fossa of scapula
Insertion
Greater tuberosity of humerus (middle facet)
Action
External rotation, horizontal extension; arm elevation (particularly in posterior planes)
Innervation
Suprascapular nerve (C5-C6)
Blood Supply
Suprascapular artery, posterior circumflex humeral artery

Movements (7)

MovementJointRoleNotes
Shoulder External RotationGlenohumeral JointPrimary—
Shoulder Horizontal AbductionGlenohumeral JointPrimary—
Shoulder AbductionGlenohumeral JointStabilizer10% contribution; depresses humeral head
Shoulder FlexionGlenohumeral JointStabilizerRotator cuff stabilization
Shoulder Internal RotationGlenohumeral JointStabilizerAntagonist control
Shoulder AdductionGlenohumeral JointStabilizerRotator cuff stabilization
Shoulder ExtensionGlenohumeral JointStabilizerRotator cuff stabilization

Exercises (37)

ExerciseRole
Turkish Get-UpPrimary
Side-Lying External RotationPrimary
External Rotation at 0° Abduction (Side-Lying or Band)Primary
Prone External Rotation at 90° AbductionPrimary
Sleeper Stretch (Posterior Shoulder)Primary
Cross-Body Shoulder Stretch (Horizontal Adduction)Primary
Resisted External RotationPrimary
Wall AngelSecondary
Prone T with External RotationSecondary
Wall SlideSecondary
Band Pull-ApartSecondary
Prone Horizontal Abduction with External Rotation (Prone Y/T)Secondary
Face PullSecondary
Prone Y-T-W RaiseSecondary
Downward Dog (Adho Mukha Svanasana)Stabilizer
Doorway Isometric RowStabilizer
Towel RowStabilizer
Towel Scapular RetractionStabilizer
Water Bottle Lateral RaiseStabilizer
Lat PulldownStabilizer
Overhead Press (Seated)Stabilizer
Supine Scapular PunchStabilizer
Barbell Bench PressStabilizer
Dumbbell Bench PressStabilizer
Barbell RowStabilizer
Bent-Over RowStabilizer
Seated Cable RowStabilizer
Pull-UpStabilizer
Chin-UpStabilizer
Dumbbell Shoulder PressStabilizer
Lateral RaiseStabilizer
Chest FlyStabilizer
Pec DeckStabilizer
Scapular Clock (Wall-Supported)Stabilizer
Scaption with External RotationSynergist
World's Greatest StretchSynergist
Resisted Internal Rotationlengthening

Sources