I've also been searching for a reason why my running hasn't gone well lately. In mileage terms the last month has been my most this year, but I've still struggled around a 10k. With only 6-weeks to go, I've got to do double that at the Longhorn, and with the cancellation of the Woodlands 101 race, that meant all that was left was the Longhorn.
So this morning I broke out the new shoes, laced them with elastic laces, put my normal walking shoe orthotic in on top of the normal innersoles. Whether it was really the shoes or the heat, this morning early I managed to get around 10k in just over the hour 1:05. Thats not a seasons best, but close enough that I'll take it.