Posted by: ray porco () on Sat Jan 21 19:01:31 2006

��I carried a copy of both papers with me and won a good number of drinks with one or the other � depending on how the other fellow bet.�

Are you telling me/us that depending on the question asked, you have an answer that always makes you right?

Does rotation start before heel plant or not?




�Ray, it just depends on just how exact a standard we can use in video analysis.�

Exactly how exact is your standard?

From
http://www.batspeed.com/research05.html

�The study covered nine years (1988 to 1996) and required literally thousands of hours. The first two years I spent charting the swing of nearly all major league ball players. I would video tape games shown on television and replay the swings back in frame by frame action. By placing a piece of clear plastic over the screen I was able to trace the movement of each part of the hitters body along with the bats reaction. I repeated this for each frame as the swing progressed. From the time the swing was initiated to the point of contact required from 4 to 6 frames depending on the mechanics of the batter.�



1. When does lateral (linear) movement cease?
2. When does rotation begin?