I have had a recent series of runs where I have been low on energy.  It has usually hit me around 10 minutes into the run, then I have had to slow down and be determined to keep moving until the energy levels slowly built back up to a normal level.  I have kept the distances low until I feel like I am ready to do a run of over an hour.

I think I have reached that point.  For today's run, I ran to the Olympic Stadium and back.  It's not a run that I have settled on a formal route for and I was making up the return part as I was going, this time.  I got a good section along path next to the Lea, near Bromley by Bow.  The total run took me just under 56 minutes.  I might cut out a bit of it (to make it a circuit) and have a 50 minute run.  I felt really good today.  I started off slowly as usual and quickly got into a good rhythm.  No complaints with my knees or ankles today.  It was overcast and cool.  It was gently drizzling by the time I was coming home and this felt good.  I managed to get in a good sprint with long strides, right up to the apartment building.  It's very satisfying to end the run like that.