Posted by: hit nut () on Sun Mar 25 11:17:14 2001

I have a masters in biomechanics from the university of cincinnati. i have study the weight shift in golf and baseball using force platforms and the peak motus system for my final college term paper. mass: is the force pulling towards
the ground. weight: is mass in motion. center of mass is an objects center in which it pulls down.during rotation this is the line of action in which we rotate around. center of gravity is the weight we use to balance. during rotation this "balance weight" shifts from the back side to the front side, in fact, while on weight shift platforms the baseball player would gain weight in his front foot, up to 110% in body mass. so as i states before, the is a linear weight shift from front side to back side. tested using wavi weight shift system,and sport balance platformsw/the peak motus system.
was not saying that a player should jump at the ball or not rotate.but there is linear weight shift in rotational mechanics.so if my words make no sense, then maybe you should take a physics class. video can not measure ground forces.