2 easy run yesterday and today, about 19km each. Weather was warmed up again, but obviously it is not so dreadful like in Summer. So the pace was comfortably around 4'05"-4'15" + some stride.
More interesting is that I extracted again the chart of the Polar Running Index and it looks really awesome.
I can not swear on the validity of the Index, but the correlation between HR and speed during the workouts makes sense as indicator of the general fitness.
Obviously I dot not think that gives any useful indication on the specific endurance/performance for a certain race distance, but at least makes comparable different period of the years or year-on-year.
All said, it is very confortable that my current level is much higher than the run up to my last marathon. It also shows the period of "stale" in September due to "heat fatigue" and mental tiredness.
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