People go on about figures for anaerobic vs aerobic blah blah blah over the 800m are complete idiots. It is COMPLETELY irrelevant.
The beauty of the 800 meters is that it is the one event where athletes of so many physical makeups can compete to the same high level.
Juantorena and Cram had roughly the same person bests over 800 meters - 1.42 high for Cram and 1.43 for Alberto. Yet Alberto was a 44 flat 400m guy - Cram by his own admission could run 49.5 seconds for 400m and "just under 49" in a relay leg.
On paper Juantorenas "anaerobic potential" is far higher than Cram, and he would appear under "67-33" theories to be far better suited to 800m running. Yet Cram ran faster. And this is just one case that I can be bothered writing about.
Some amazing 800 meter runners are also anaerobically AND aerobically poor by elite standards, they just simply have other completely unexplainable physiological assets such as acid buffering at certain speeds (for an elite guy 25.5-26.0 second pace), and thats what makes them good. This alone throws any "anaerobic vs aerobic % values" OUT THE WINDOW
Americans should be able to recognise this better than anyone. Every year you get completely random guys coming out of your college system busting out 1.45's at the NCAAs who have neither blazing 400 speed or miler endurance (best example Jeremy Mimms who might have even run 1.44 - he warmed up in freakin basketball shorts and kicks and might have run 47.5 on a good day and under 3.50 for 1500 in his wildest dreams - yet an amazing 800m guy)
It also never ceases to amaze you guys who also quote guys like "William H Freeman". William H Who? Who says this guy knows what he is talking about? How fast did he ever run? How long did he train for the 800 meters? Too many of you guys have "University'itis" of believing any crap you read from text book.