Thanks for your response, Jack.

In response to your points.

1. You’re wrong. That’s why pretty much every Mr Olympia in history trains once a day focusing on one major muscle group. It’s optimal for building muscle, even for people on gear.
2. I was using an example to explain how it works. But my example is pretty spot on. Any experienced life will struggle to put on more than a kg of muscle a year, unless you’re on steroids. Therefore, 500 grams over 9 months whilst losing body fat would be pretty good and obviously nutrition would have to be dialled it to achieve this result.
3. Yes, there are some genetic outliers. Maybe one in a million. But that wasn’t the point. The point was how much extra potential a person on steroids has.
4. But it doesn’t build muscle any faster. You may recover to an extent, but not enough to go back the next day and train at your peak, consistently every day. Training hard enough to progressively overload. Otherwise, every Mr Olympia would train 2–3 times a day. They didn’t. If they train twice, they second time is low intensity cardio — walking on a treadmill, so they don’t take energy away from recovery.