Your heroes are not my heroes.
And I did it all substance free. Because I know that that these "strength and conditioning" coaches are quacks. Restrict water, give nonsense training regimens, let your athletes get injured, dehydrate them, and then pump them full of pain killers and steroids? And watch them die of neglect? Race horses are treated better.
If you want to get bigger and stronger? Talk to a powerlifting coach and a nutritionist.
Want to get faster? Talk to a track coach.