You cannot simply change the subject of the debate in order to save face. We are way too intelligent here at TID to be fooled by or accept such a tactic.
Your incorrect assertions, as shown in bold above, are what brought about this debate. Again, I implore you to explain how training LEGS twice per week, or even more, is detrimental to building a round butt? This thread is not about anything other than the OP's desire to build a round butt. The advice given was by powerlifters, olympic weightlifters, bodybuilders, and general gym rats, and the consensus is squatting often. Then you come in and say that is wrong. Now you want to change the topic to entire body building and specific to the sport of bodybuilding.
Again, there are many many examples given of athletes with overly developed glutes, who got them using what you claim to be inferior regimens. Please back up your ORIGINAL statement.
As for the cortisol, again, you mistakenly assumed (or intentionally, in order to avoid embarrassment) that anybody is recommending a split that hits every muscle group twice per week at high intensity. You are arguing with yourself until you address the assertion in the context it was made, that cortisol levels skyrocket because of training "A bodypart twice a week". That's not how it works. If you have your doctorates degree, maybe you can teach me something (that all of the literature will clearly refute).
You just can't seem to grasp the debate here. Please see above for clarification.
The irony is that I have already addressed your questions. I have a T shirt I should wear for you. It says "I can explain it to you, but I can't understand it for you". However, I will dumb it down further in the hopes that you can grasp the concepts. I have trained dozens of Asian women, my wife is Asian and has a very round butt due to my training protocol. Most of these women were girlfriends (3 fiancés, lol) so I took them from never having touched a weight in their whole lives, to "round butt land."
First, lets clear up a few fundamental points: Yes, if you are doing a whole body workout, or a 2 way split, yes, you can train a bodypart more than once a week. However, if a body part like glutes is lagging behind a body part like quads, then it is clear that you have been training long enough to have developed asymmetry. In fact, and I have trained 100's of beginners (was a full time pt for 6 years) I always start people on a 2 way spllt, training 3 times a week. However, assuming that they are putting forth good effort, I move them to a triple split, and they train 4 times a week. It takes at least this long before any training asymmetries become apparent. Unless they want to do a lot of arm work, I usually keep women on a triple split, adding volume until they are training an hour and 15 minutes, 4 times a week. Men I train usually go to a quad split at this point, lifting four times a week.
It is at this point where we begin to address muscle imbalances. As I argued above, the first principle we must work on is the mental aspect of training. As I said earlier (although apparently you skipped over this critical point, see T shirt above) the human body wants to do things in the easiest way possible. It is a survival mechanism developed over millennia. If my quads are naturally stronger than my glutes, my body is going to load them accordingly. At this juncture, we work on "feel" as explained above, then we work on increasing intensity. These are the 2 critical components needed to bring up a lagging body part. On leg day, we hammer squats, lunges, and straight leg deadlifts. This training is extremely taxing. In regards to the other workouts, they are not a walk in the park either. The trainee is busting their hump an hour and 15 minutes a day, 4 days a week. They either do 2 on, 1 off, or 4 workouts spread over the week.
If they are training with the requisite intensity, by day 2, cortisol levels will be elevated (cortisol being he enemy of muscle). A lot of gear can suppress cortisol, but I am not a fan of putting women on a lot of gear.
As mentioned, I have had tremendous success putting butts on Asian gals using this ^ protocol. In fact my first wife became the CA state powerlifting champ (squatting and deadlifting 303 lbs each @ 123 lbs bodyweight).
Now, if we started hitting a bp twice a week, we would be looking at 2.5 hour training sessions, or training every day for an hour and 20 minutes. For starters, It is impossible to maintain requisite intensity training every day or for 2.5 hours. Even if we could, cortisol would be out of control.
Consequently, training a bp twice a week is a recipe for getting smaller and weaker.
And in regards to my protocol being only for genetic freaks, not true. I have below average genetics for bodybuilding, but nonetheless have been successful. When I was competing, I had pro level legs (just not anything else, lol). Put another way, if a former pencil necked geek like me can build muscle, any one can build muscle.
So, to summarize: For the average trainee, the key to building muscle is intensity, feel and adequate rest and recovery. Training a bp twice a week is antithetical to these necessary principles: Intensity and recovery will be massively compromised.