Seb Coe had phenomenal

Coe: "At the bell, I started to move for a hard final 400, when Cheshire also decided to make a run. After a dozen strides he suddenly slowed, and I went into the back of him. I must have lost at least half a second with that stumble. I won by about 40 metres, and but for the collision the record would have gone."

last 100m of Rieti race here

http://www.youtube.com/watch?v=lalr2HMpX2E

ventolin wrote:

800m is long enough distance that it isn't anywhere close to an "all out sprint" & logic dictates that it shoud be run as close to "even pace" thruout" for most efficient energy expenditure

See the "Does Alactic Sprinting change aerobic potential" (something like that) thread. The first 400 is generally quick because the first 100-200 is fast. This is due to the "free energy" from the stored energy in the muscles that is lost if you don't use it in the first few seconds.

You are saying, that ideal pace for 1.43,0 is 52,0+51,0.

So the logic for 1.44,0 is 52,5+51,5 and for 1.41,0

51,0+50,0. Strange that the PR's of world class runners

are newer run that way. Probably 95 % of records are

run with the first lap 0,5-3,0 sec. faster than the second.

It is difficult to think that they are nearly always running with too fast first lap. Year after year,decade after decade.

Borzakovskis splits were 51,0+51,5. His running line wasn't ideal. Mathematically c.50,9+51,3.

Cram's 1.43,22 with 51,8+51,4. Mathematically 51,8+51,2.

Cram's record in Zurich(85): 51,1+51,8. He was running wide

in the second and 4. curve. At least 3-3,5 extra meters.

Mathematical time c. 1.42,4-5. Splits 50,8+51,6. My estimations of mathematical times are always conservative.

They are done with good quality video tapes and counting

athletes running line step by step. Many times they are giving a good indication or athletes true potential.

i believe that is the creatine phosphate pathway

i'm not sure whether you lose it if you don't use it straight-away, besides similar woud apply to 1500m & beyond - use it in 1st lap or lose it, but no one advocates running 1st lap of a 1500 quicker than the rest

i wasn't asking for your estimates of extra distance run as i find them of flawed accuracy & you claim to have seen every millisecond of their pathway which is nonsense as camera often cuts towards the upper body, thus not seeing their feet's path & you cannot accommodate parallax error

besides i disagree with your splits for borza & cram

i get borza's splits as being much slower on 1st lap ~ 51.75 + 50.75 - i suggest you look up official splits in a mag & similarly cram's in his 1'43.22

cram's 1'42.88 pb was run-off a high 50, but that race was damned in his own words - he stated he hated running 800s off standard 2s split differential of maybe 50+/52+ as he found going thru so quickly very hard & much preferred a slower 1st lap & may explain to some extent why he rarely ran 800s on the circuit - that day he was forced to as he wasn't star attraction - cruz was & cruz wanted to go thru in 50+ & cram had to like it or lump it

from vid it's very obvious cram struggled in the home-stretch in that race - he was much more comfortable in his 1'43.22 ( albeit he ran 0.34s slower )