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I am training for the Silverstone Half Marathon in 2 weeks time. I am new ish to running and have trained well [apart from 3 weeks out with a bad back]. 10 days ago i ran 10 mile in 7m53s miles and 3 days later [6 days ago] i did another 10 miles in similar time. However, i uped the mileage today to 12 miles and felt so lefargic it was untrue, i felt like i had no energy whatsoever. I got round 12 miles in 8m 10s miles and could not have done it any quicker.
I wanted to do Silverstone in under 1hr 45min, but with only 2 weeks to go and a bad run/time today i am not sure it is possible. I don't know if todays slow time was from doing too many long runs or becuase I went out early morning or i am just not fit enough....
Anyone else encoutered this and if so, how best to react to it and what should i do in the next 2 weeks? More long runs, or mainly just rest?