I’m already doing all out (100% effort for a 300m) split runs and I’m still in GPP. I don’t see a problem with this because even if my 30m times improve a tenth of a second and this could carry over to my 300m by a half second or slightly more, so what? I’ll run faster then, the times I’m running now are still very specific and are helping me improve muscle strength, work capacity, posture, and technique.
That’s kind of what I was stating in my thread above yours. Start off with 2-3 weeks of Int. Tempo and then progress to split runs (which are a type of SE), then SE2, then SE1, then speed endurance during the end of Pre-Comp. and all of Competition period.
So, to sum it up, there is no problem with going 100% in GPP as long as everything progresses.
My point is when doing SE runs (e.g. a 300m) you only have 2 runs and the intention is to do them f-a-s-t. If the runs are split (e.g. 150+150) the first run will effectively be a 150m 95-100%, while the second run, due to insufficient recovery, will be at 100% effort but no where near 100% of best time.
This first run, when being performed is effectively a Speed Endurance run (a 150m flat-out, performed while fresh). Should tis kind of running not be confined to later in the training year, when all training elements are in place.
But its not separate from the 300, just a part of it. If you were running an all out 300 would you regard teh first 150 as a speed endurance run? If so, then you’re right its speed endurance earlier than advised, but is a definition issue.