3 w/u, 10 x 400m @5K pace, 400m walk/jog recovery, ~3 c/d.
Felt pretty good during the first 8 repeats, but right hamstring was getting tight, so I eased off the gas for the last two.
Overall avg pace for the 10 repeats was 5:54. It was actually 5:50 pace for first 8, and about 6:18 pace for the last 2, where I was taking it "easy." So, I should have no problem running a 5K at ~6:15 pace (~19:20), but no way I could keep up 5:50 for an entire 5K (18:06), at least not right now. Split the difference: 18:43, which is ~6:03 pace. That seems daunting. Maybe a good strategy next week is to start around 6:10 for the first mile, and try to ramp it up gradually from there.