Breaking The Mold

Did a 7K Heart Run this afternoon before work.   Hit a 4:45 pace at 4K as per usual however the HR was high pushing 160 so at 4.5K I backed it down to a 6:00 pace for a few hundred meters then ramped it back up completing the run as usual.  Guess I am paying the price for not doing any speed work for the past month!!!!!!