sorry, this is a bit boring but Athens being a hilly course seems to have wielded some strange results.
If you don't know the course, you pretty much run flat for 6 miles, then uphill 14 miles to the 20 mile point (2% incline), then run downhill (2%) the next 6 miles. In some respects, it feels like doing two separate races. Even if you reach the top well knackered, you are then starting afresh using different muscle fibres. So:
1. my legs have never recovered quicker from a marathon. In fact, they were barely stiff afterwards. Why? Is it because they were not just subjected to a flat 26 mile pounding, or because of point b below?
2. As a result of a slight cramp in my calf, I could not (dare not) run as flat out as I'd liked in the last 6 miles. And yet, my average heart rate was as high as it's ever been for a marathon (154 bpm) despite being 5 years older than when it used to average 154. Sure it would have been higher apart from the cramp.
So, what does this all mean? I have this theory that running with different muscles engaged may mean that you can possibly get more out of your body? Can you, therefore, change running style during a race and get better results?
I assume not, but can I still write a best-seller off the back of it?