Technical Details
- Variable Type: Event
- Data Type: Integer
- Units: Frame number
- Column Name:
max_shoulder_external_rotation_event - Required for QA: False
- Measurement: Frame at which shoulder external rotation is maximum (between ball release and apex)
Description
Max Shoulder ER marks the instant of maximum shoulder external rotation during the serve, typically occurring in the Cocking phase (between Low Arm and ball contact). It defines the end of the cocking phase and the start of the Acceleration phase.Use Cases
- Cocking phase duration and shoulder load
- Cocking Phase Max Shoulder External Rotation timing
- Acceleration phase start (max shoulder ER to ball contact)