Can you recommend any drill or exercises to increase arm speed please? Thanks
Proximal stability creates distal mobility.
To add to the discussion, the old standard: The Steadman Hawkins report
Elbow contributes 4% of velocity, hand 1%. Also, shows the arm speed. Scroll through the pages. I would love more analysis on the charts in here:
Softball Pitching at the 1996 Olympic Games
I am not sure this is the full report, may be available elsewhere?
Found the scholarly article: "Kinematics and kinetics of elite windmill softball pitching." The American Journal of Sports Medicine. 34.4 (Apr. 2006): p597.
http://www.esaabb.org/docs/Windmill-Kinematics.pdf
Could we discuss why so much time is spent on the last 1/4 of the circle when it only contributes 4 (5)%? I would say that part is important for movement versus non-movement pitches as the pitcher needs to get good spin (which could account for the elbow contribution being higher on some pitchers in the study). But it seems for the FB, all that work on 1/4 snaps for 5%?
Can someone figure if the upper quarter does anything (does 'elbow snap' per the study include the upper 1/4?) or is it all the push off the plate and landing?