Technical Details
- Variable Type: Discrete Metric
- Data Type: Boolean
- Units: True/False
- Column Name:
knee_collapse - Measurement: Front knee flexion
- Threshold: flexing >20° between foot contact and ball release
Description
Knee collapse is a binary indicator that flags excessive front knee bending during the pitch. It occurs when the front knee bends more than 20 degrees between foot contact and ball release. The 20° threshold accounts for the initial knee angle at foot contact. In other words, if the knee is flexed 15° at foot contact, then surpassing 35° would indicate knee collapse.References
- https://www.onbaseu.com/articles/Coaching/collapsing_lead_knee_one_of_the_most_significant_power_killers_in_pitching
- https://floridabaseballarmory.com/lead-leg-blocking-is-corruptive-it-has-to-go/
- https://www.integratedperformanceteam.com/blog/pitching-mechanical-faults-lead-leg-block
- https://treadathletics.com/back-leg-mechanics/
Use Cases
- Lower body mechanics assessment
- Stability evaluation