Here are few images of Bubka's winning 5.70m jump. I outlined body and pole for better understanding:
- bh1.jpg (91.91 KiB) Viewed 8606 times
- bh7.jpg (20.76 KiB) Viewed 8606 times
If I am forced to do so, I would describe this jump as "back kip to stand". His feet are going further back, over-covering pole and body. Then he is performing kip action up to vertical stand (over-covering is term I just coined, PVDaddy will probably call it negative covering). All the time his legs look almost like extension of the pole and move in sync with pole top (tangential) ensuring pole covering as long as humanly possible.
He is totally inverted before pole recoiled. In some frames, body vertical angle looks like greater than 90 degree (negative inversion?). Right before fly-away his body is in strange position - twisted back in inverted C.
PVDaddy, would you consider this video as an example of your negative inversion concept?
Barely one year later in London (5.90m) and Rome (5.94m) his jump looks different (both can be found easily on YouTube). The camera angles are similar to Helsinki video. They look now like classic Bubka. There is no more such pronounced kip and pole covering - just smooth transition from swing to extension. Pole release is Bubka-esque with almost no apparent push with hands (who need it with such stiff poles?). And yes, the pole is whipping wildly after release. Just watch 5.94m jump from Rome. After releasing, the pole skipped from the box and wander around the track still vibrating - not good idea to catch this pole.
Does my eyes, bad angle and poor video quality are fooling me or he (they) introduced some pretty big changes between '83 and '84?
If yes, why Petrov altered this part of jump?
