Think about how a person is educated. When they are young they learn “general” things. As they grow older, they develop interests and focus more on learning specific things. General to specific.
Think of a pyramid, or a tree. Trunk first, then branches. The important thing to realize is what grows the tree or builds the pyramid is time, because over time, people experience. And with that experience, they learn and refine.
Like anything else, this process happens within track and field on multiple levels. Below I am taking you through my weight lifting routine. It hasn’t always been like this. I started with a general (albeit one of the very best thanks to coach Jimmy Radcliff at University of Oregon) routine. Over time, I have learned about my body and about my event and refined how I lift to optimize my performance. These experiences have led to the development of this specific routine.