Quality not Quantity

Had a rest day yesterday but tonight Tom, Jasper and I pumping out the distance stuff tonight. (1km followed by a 400m) x 4. Started off a bit conservatively with the first km in 3:10 before the first 400 in 66s on the track. Next km fair bit quicker in 3:04 but didn't feel it and the 400 was quality in 66s again. Recovered and hit 3:01 for the next km which surprised me and I managed drop everyone on the following 400m in a 65s, 2 seconds ahead of everyone else. But I definitely paid for it on the km I managed 3:03 but I was pretty stuffed, Tom pulled ahead but about 3 seconds in the last 200m. But I pulled a 64s last 400m after the km so really happy in all. So lactic afterwards, definitely felt it then and feeling it now. 9.2km all up.