Do I have to reiterate that "yes, it can help", and "no, it's not the best way." The best way to train 200/400m is lactate tolerance which is done in tempo running. The 12 minute is better suited for the 400/800 athlete not the 200/400 athlete, because the 12 minute run is a VO2max run or what is considered aerobic capacity training. You will actually derive more aerobic benefits from tempo running, than aerobic capacity training.
woops i made a mistake in the above post… i put my reply in your quote lol…
What i was asking though is if it would be a good idea to replace only one extensive tempo day witha 12 minute run.. . so a sample set up would be:
tues- 12minute run
or do you think that io should only do ext. tempo? (the only reason i am inclined to try and use the 12 minute run is b/c of the v02 max benefit and its use in the 400m) Perhaps a periodized scheme when i alternate between the 12 mintue run and an ext/int tempo session on the tues?