Approach run misconception.
The number one "miss conception" in the pole vault approach run is:" if you start too fast on the approach run you will run out of speed by the finish."
This is a total misconception.. and impossible. This misconception is holding us back in the vault.
The approach start should be aggressive, slight forward lean, pushing and accelerated to at least 90% speed to the six stride mark.
The problem is this. Every vaulter who started faster and felt they started too fast in major competitions, hit the wrong (too far out) "MID" mark.. everyone. Going all the way back to the 70's when i first "checked the science" and started monitoring the six stride "MID" numbers.
Here is the dilemma.. the jumper has raised their grip or moved to a stronger pole, the bar has gone to a "winning" height.. what is "natural" for you to do?
Run faster so you can move the grip to vertical so you have a chance to win.
When you do that with "adrenalin" and without "pushing" correctly you will "short step" each of the first 12 to 14 steps by one or two inches, putting you "out" at the six step "MID" by one(30cm) or two (60cm) with no way possible to get to the correct takeoff without stretching. Stretching causes you to slow down and feel the same as if you have run out of "gas".
This is what has been happening forever.. this is what happened to Isi in the world champs… I have recently seen this happen, just this season to Lavillenie, Hooker and Walker and others.. it's easy to check just from the videos that are being published. You don't need to know the distance from the "MID", you can merely compare one jump to the other.
This is exactly why I have been "suggesting" that every jumper and coach "monitor" the six stride mark for consistency. Where were you when you jumped your best and what did the "science" say about each jump, good or bad?