I am not a track and field coach, but it seems like many of the training principles to improve linear speed are based on the distinguishing factors between the elite and super elite. Like the differences in GCT between the fastest people in the world and second fastest, or stride length, range of motion, GC position in relation to COM, etc.
My question is how much of this type of system for linear speed improvement can be applied to multi-sport athletes of poor to average physical ability? Are similar distinguishing factors seen between poor and average performers as seen between elite and super elite? Should those of us that train 13 yr old, slow soccer players be careful of applying a philosophy for training that was developing from analyzing the fastest people in the world?
Is there any literature that analyzes specific speed variables between poor and average performers?