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Nice one! Give yourself an easier week - I'm sure your body will thank you.
Early on in a build you can go many weeks in a row with 10% increases and get away with it, but at some point the fatigue will kick in (I think it was about 50km/week for me when that happened, but that's more complicated as I had swimming, cycling and 5-a-side which wasn't included in my running load plan). If it happens take an easy week and then opt for 3 weeks of 10% build and then an easy week, the next 10% gain is from the hard week the week before, not the easy week (~15% if you calc from the easy week). Lather, rinse, repeat.
Weekly increases would be:-
+10%
+10%
+10%
-5%
+15%
+10%
+10%
-5%
+15%
...e.g. 30, 33, 36.3, 40, 38, 44, 48.4, 53.2, 50.5, 58.5, ...
My progression over the last few weeks:
19.9km
22.7km
21km
25.9km
29km
32.6km
36.3km
Everyone's different and has different aims but your weekly increases seem insane to me.
Also, there's not much point benchmarking yourself against a race time, when you're so badly rested, using HR as the metric.