a 115/124 split would do me nicely. So the consensus is that 1:52 first half is not optimal, but there must be some truth in the article as they wouldn't bother to write it?? I think they should have put a large caveat.
IF you are considerably fitter than a 1:52 half so can jog this time comfortably, but at the same time do not have a huge endurance base and will fade considerably in the second half, then this tactic might work.
For the average person, what do you think the % of max HR should be for a marathon?? Presumably as low as possible!
Maybe even paced to 20 miles in 2:58 is the compromise, this would be 1:56 at halfway. This would allow a fade to just under 10 min miles for the last 6.2 which should be achievable if you are anywhere near fit enough for the sub 4.