ill break down OLINE play (played at a high DIv 1 level and been through a few nfl camps)
So every play u get banged, sometimes u wait for a d lineman to bull rush you , hit you right in the mouth, or he tries to speed rush you, u have to be quck on your feet and decision making. Ok now next play, u need to read the defense and adjust the blocking scheme accordingly.. every play has a few schemes, every protection has an option of things to do depending on the defense and the blitzes, its basically a ton of shit. Ok and i have to be 300 plus and move , and then we get no glory.... not exactly the position kids sign up for and dream about , but i enjoyed it and had fun.
As a matter of fact i am thinking of taking some of the stuff i got from the NFL, and College and developing Oline camps for hs kids,... its still a thought but something i may eventually do. Give the HS kids some pride about the position they play