SFMA Shoulder Extension
Biomechanical analysis of SFMA shoulder extension range of motion assessment, including compensations and functional scoring.
SFMA Shoulder Extension
Overview
The SFMA (Selective Functional Movement Assessment) shoulder extension assessment evaluates the range of motion and quality of movement in the shoulder during extension. This assessment measures the ability to achieve sufficient extension while maintaining proper alignment and identifying any compensations.Events
| Event | Data Type | Description |
|---|---|---|
| MaxElbowFlexion | Int | Frame of maximum elbow flexion during extension |
Discrete Metrics
| Metric | Data Type | Units | Description |
|---|---|---|---|
| MaxElbowFlexion | Float | degrees | Maximum elbow flexion angle |
| MaxExtensionAngle | Float | degrees | Maximum shoulder extension angle |
| MaxInternalRotation | Float | degrees | Maximum internal rotation |
| SideBendComp | Boolean | - | Whether side bend compensation occurred (> 20°) |
| WristDeviation | Float | degrees | Wrist deviation angle |
| Functional | Boolean | - | Whether movement is functional |
| WristToShoulderDistance | Float | m | Distance from wrist to shoulder |
Notes
- All angular measurements follow ISB conventions
- Maximum elbow flexion is detected using peak detection with inverted signal
- The event is used to identify the time point for assessing wrist/fingertip position relative to shoulder
- Functional movement is determined by wrist/fingertip position relative to shoulder