grandevaulter wrote:Speed alone without optimal body position in the approach will not yield optimal results.
This seems to support Branko's assertion that there was some technique (running technique counts, too) taught in his model. In fact, he even alludes to this model allowing for an improved pole carry, which most will agree effects runway speed.
grandevaulter wrote:Looks like PB model.
Your comparisons and descriptions with #1 and #2 are smoke in mirrors in regard to "pulling with the left arm"
I can understand why you and many others can feasibly argue that this is a Petrov model being executed by watching this video. If you or anyone else had not read what Branko has already posted, you might present a credible analysis of two athletes attempting the Petrov model, but needing a few improvements. Unfortunately, pictures and even video do not tell the whole story!
Take these for example:https://www.youtube.com/watch?v=wooo4n8weU4&list=UUYe6skCiwQXqKQrx91uHkPQ&index=7https://www.youtube.com/watch?v=qPHdlD8Gk4c&list=UUYe6skCiwQXqKQrx91uHkPQ&index=5
If I had no idea who these athletes were, I would say that despite being way inside at takeoff, they get a nice pre-stretch and have a pretty great long sweeping trail leg! This is an obvious component of the Petrov model, so it would be somewhat logical to conclude that these athletes are keeping their trail leg long by design/intent. However, both of these guys are classic tuck-and-shoot vaulters, and (please correct me if I'm wrong, Tim) did NOT aim for a long trail leg as part of their model. They were focusing on different cues, which nevertheless resulted in a long trail leg.
I think that many vaulters and coaches alike get very tied up with how a vault "looks". Is visual feedback important in learning/coaching? Of course! Is it the only thing that one should consider? Absolutely not! From a scientific perspective, what matters in the end are pure numerical results, like runway velocity (m/s), angular velocity, grip height, bar height, etc. At the end of the day, the winner is the one who jumps the highest, not who looks the best doing it! Branko is sincerely filling us all in on what he focuses on with his athletes, much like Tim McMichael did several years ago with the model he used.
We also keep focusing on the long trail leg. Is this a biomechanical advantage? I think most, if not all of us, can agree that it is. What I think Branko is questioning by creating this thread is whether pulling with the bottom arm is another distinct biomechanical advantage (again, please correct me if I'm wrong). If it does
, why aren't more people intentionally
vaultman18 wrote:For me it is very simple...if you don't do it on a stiff pole you should't do it on a bending pole.
Food for thought: The Petrov model attempts to emulate the original stiff-pole vaulters like Warmerdam, something that Petrov supposedly admitted himself. What do the arms do during a good, classic stiff-pole jump? If they are in fact pulling, why are those that advocate the merits of stiff-pole vaulting NOT having their athletes pull?
P.S. Please forgive me for using your videos without asking permission, Tim!