Hey
No, no, you get the wrong idea.
We aren't staying on a weight for anymore than 2 weeks.
Rather, an idea for extending the cycle is to repeat a significant weight 3 times.
It is merely like the post 5's, wherein you repeat your absolute max for a couple more workouts.
Is there a difference in repeating your max and repeating a lighter but still significant (meaning effective) load?
Nope. Semajes already hit the reason. It's about conditioning.
Your muscles can't discriminate between a weight that is your rep max and a weight that is lighter, given that it is deconditioned properly. If your RM is 250, and you know that around 180 is already effective after SD, then repeating 180 will be the same as repeating 250 when you get to 250. All the muscles need is a load that is effective - whether it is your max or not is out of the question. Your RM's are simply for your benefit, so that you have a guide how much you can do in a given rep scheme. But for your muscles, they hardly mean anything. If it's effective weight, they'll respond. If not, they won't. If you repeat an effective weight, they'll still respond. If you repeat a weight that isn't effective, they won't respond anymore.
You can extend your cycle (perhaps if you don't like frequent SD) by simply repeating each significant weight three times after you lay out the progression. If you already have a 6 week cycle without repetitions, for example, then repeating each significant weight load (like those in the 10's), will mean
each RM phase will double or triple in length.
And don't be too scared of RBE hitting quickly. An individual weight can remain effective for 4-6 weeks. That's more than a month. Staying on each weight for a week is nothing, or even 2 weeks.
Regards,
-JV