Mid 6

12k at a mostly 5:27 pace this morning.  HR was about what I expected high 120's to low 130's.  11K in or about 60 min  I started to gear down 11.0-11.2 @ 10kmh,  11.2-11.4 @ 9kmh,  11.4-11.6 @ 8kmh then 11.6 to 12.0 @5.1 kmh.   At 12 K I sat down for 5 min.  Transition from running at 11kmh to walking at 5.1kmh between the 11 and 12k mark the HR droppped about 30 bpm.   Sitting down for 5 min it dropped less then 10 bpm.   I was expecting more around 20 bpm.