Using a Weighted Sled for Acceleration Improvement 0
Before even beginning, let’s clear up one point.
Sport is about acceleration, not speed.
We have a problem in sports. Coaches consistently use the wrong term when 
discussing the quantity they covet most. Tests like the ten, twenty and forty yard dash are actually tests of acceleration not speed. You only need to look at world-class sprinters to realize that top speed is not even achieved until approximately 60 meters. As coaches, our interest is not in top speed but, rather in acceleration, the zero to sixty of the auto world. How rapidly an athlete accelerates will determine success in team sports, not what the athletes absolute speed is.
Why does this matter? A great deal of the research on speed development focuses on speed in track and field context and not in a sport context. In track the shortest event is the 55 meters, in sport the long event is a forty yard dash (although baseball will go 60). The track influence may in fact have limited application to sport due to sports frequent use of acceleration mechanics versus
