[astee]

For naturals, there is significant overlap in the training style that produces maximum strength gains and maximum size gains. Larger muscles are stronger muscles. Studies have shown very similar size gains between groups performing high weight sets and more moderate "hypertrophy" style sets, though training with higher weight maximizes strength gains. One thing not revealed in short term studies, but which I have observed[1], is that training for strength early on eventually produces better gains in size, since when you do shift to "higher rep" training, you will be able to use more weight -> bigger muscles. Regardless, I don't think it's all that important to stress over these details, and progressively overloading (increasing weight/reps) the compound movements (squats/deadlifts/bench press/overhead press) over time is far more important than rep schemes and intensity.

For steroid users, the equation changes some, as they benefit more from very high volume, high rep training that pumps the muscles full of blood. Natural lifters cannot recover quickly enough from this sort of training.

[1]standard disclaimer about taking this with a grain of salt as I'm just some internet stranger, but I do have > 10 years experience with this

[porb121]

regarding [1], you would have a hard time getting agreement from big names in evidence-based lifting circles. e.g. I'm fairly certain Israetel, Nuckols, Helms, and others have all disagreed, and I am less certain but believe others (James hoffman, James Krieger) have too