📖 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.

Forearm Supination

Proximal Radioulnar Joint • Elbow • transverse plane

Draft80%

Rotation of the forearm so the palm faces anteriorly (or upward).

Axis: longitudinal

Normal Range of Motion

AROM
0–80°
Active range
PROM
0–80°
Passive range

Measured from the thumb-up neutral position with the elbow flexed 90 degrees. AAOS and Norkin & White list 80; other sources cite up to 90. Supination is typically equal to or slightly greater than pronation.

Source: AAOS Joint Motion; Norkin & White 2016

Muscles (3)

MuscleRoleNotes
Biceps BrachiiPrimary52.1% activation during supination vs 5.1% during pronation [Bader 2018]
SupinatorPrimaryPrimary when elbow is extended
BrachioradialisSecondaryAssists supination from pronated position

Functional Tasks (1)

Opening a Jaressential

Exercises (4)

Bicep Curl
Forearm Pronation/Supination with Hammer
6-Direction Wrist Resistance Training
Biceps Curl

Sources