Immediately after the run I start assessing my hip and unfortunately today it ached more following the run than it has in the past. That could be due to running in the racing flats, the quicker pace or pent up anger disguising itself as pain in the hip (that would be the assessment based on the book I'm reading).
I'm going to keep running though with a day off in-between. I'll try the racing flats again and take the "race" out of the run and keep it slower next time. Well maybe not...my next run is a strength workout at the track where I run a lap and do sit-ups, push-ups and other exercises and I always run the laps faster than I should.