Look, I agree that Romanov makes some good points (such as: try to land right under one's body, not ahead of it, and that a slight lean forward could be beneficial for forward momentum, at least better than leaning backwards), I just think he overemphasizes many points in order to make his "system" seem more original than it really is.
I know. I only suggested otherwise because one poster acted like virtually only the hamstrings come into play for forwards movement when running "pose".
1) I disagree that the "only active muscle recruitment is coming from the hamstring upon ball of the foot impact." As I mentioned in my demonstration, if simply pull my feet of the ground, I will not move forward much at all. Dr Romanov talks of "falling forward." What is the best way to get that forward falling motion ? I think it is pushing the body forward by leaving the foot on the ground as long as possible (not pulling it up immediately) and pushing against the ground with your foot by using the hip extenors.
2) I agree that forcing a longer stride than one can handle is be counterproductive. If one is not strong enough, or flexible enough to create a big hip extension angle, they simply won't be able to do so efficiently. And YES, of course trying to increase stride length by landing in front of one's body will act like a break, and be inefficient. This is not the way to increase stride length.
3) I agree that many top runners have strides that have similarities to some of the "pose" method "techniques." I just disagree with some of the explanations that Romanov gives on why his technique works (some of the gravity concepts, that idea that one should just pull one's feet off the ground as quickly as possible with no "pushing" to create forward motion, and that worrying about stride length is a waste of time).
Lets some up the proper way to run:
create forward momentum of your body as powerfully and efficiently as possible with leg 1 (using concentric action/power of quad, ankles/calf, hip extensors/ham/glute) and then, also as powerfully and efficiently as possible (gravity assists bring foot to ground, but this is NOT a passive process), place foot of leg 2 under one's body in order to continue momentum with as little decceleration as possible . Repeat step 1 with leg 2 .....(ie, use as little energy as possible to continue the momentum you achieved with first leg).
I just don't think Romanov has shed that much new light on this concept. I think he has contributed to running by getting us all to think about what running is in its most basic parts, and how to best achieve forward momentum effiently, but I, and others, just don't agree with some of his explanations/concepts, or at least don't find them that original/interesting.