The execution of the drills themselves varies from institution to institution.
Problematically for so many athletes is that so many ‘S&C’ coaches hang their hats on outworking the competition and the work falls directly into anaerobic-glycolytic efforts which does not correspond to the bioenergetic structure of the sport.
Drills consist of 110yd linear runs, 300yd shuttle runs, Gasser runs that are over and back across the width of an American football field (~53yds each way), and so on.
The glycolytic efforts come into play because the efforts themselves are often instructed to be ran as fast as possible and the recoveries between efforts are incomplete.
Add to this type of work any combination of jumping/plyometric drills, running over/around bags, etcetera and the volume becomes extensive yielding what I suspect to be galactic blood lactate concentrations.
This type of work is often performed on the same day as some type of intensive weight training.
Again, it varies from program to program, based upon what I’ve seen in the industry, and it’s a complete rodeo.