Supposed to be 8 mile threshold run with 3 miles at 15k pace, but lost track and added an extra km.
Backed off the fast bit a little from last week as sub 4 / km took a bit too much out of the legs. Still went sub 4 on the first, and had to really force to slow down. Splits were 3:59, 4:08, 4:08, 4:10 and 4:05. All felt nice and easy during the fast bit, but the left lower calf started to seize up a bit on the cool down (which was a km longer than it should have been...)