FatRat said:Once again there are just far too many variables to take into account when it comes to recovery. You have to go by the way your body feels and your progress under your own unique circumstances.
I think Casual means to say that the variables are accounted for when he's talking about hitting ea/ bodypart once weekly; i.e., the studies he's cited that recovery is fixed, that volume is minimal, that you don't go overboard on intensity, etc.
Personally, after a hi intensity, relatively high volume workout, I would want to wait 6 / 7 days before working that muscle group again. Therefore, I would opt for 7 for practicality.
Absolutely. With any kind of volume plus "high intensity," hitting something more than once a week is going to be awfully rough.
With reduced volume training such as DC, I can just about get away with the 3 sessions every two weeks, but have to say that even with this my CNS starts to get overloaded after a month or so.
For me, 2x or 3 x per week just would not give me the recovery time AND THEN THE GROWTH TIME that I need
Well, for that month, if you were getting stronger, you probably had ample recovery time.
I think it's important to make the distinction between what's ideal for relatively short periods--push, back off, push, back off--and what's good for the very long-term.
If someone planned to do very hard work on a bodypart, even with minimal volume, for 3x week for weeks on end, they are going to burn out. Fast.
I don't think Casual is suggesting that. As a HST advocate, his 3x weekly bodypart hits aren't all balls to the wall as I understand it. That's not to say they're not hard...but I don't think HST has you at your maximum output for a real long time.
You pays the money, you takes the choice…
PS I would not necessarily consider the “fastest” way to gain as being the “best” way to gain, this is a marathon not a sprint, and you need to look at the long term!
That's true, though I see it more as a long series of sprints followed by walking real slow

It is very important to look at the big picture, though, and I think some of you guys are missing Casual's point about that. He's not suggesting that a bodypart can be trained hard 3x/wk. for long periods. To be sure, not nearly as long as one could train that bodypart just once a week.
But is it possible to do that and to grow faster for short periods? Yes. And that would be ideal if you meet a certain no. of circumstances (very low volume particularly). But you don't do it long-term, at least with any routine I've ever heard of (DC, HST).