500m x 3 (rest 5m) 1km pace (2km minus 5) Improve. 2K minus 5 means that the pace for 500m shown on the monitor is 5 seconds faster than their average pace for their fastest 2000m effort (so for a 8:00 2K – the average would be 2:00 – therefore 2km minus 4 would be 1:56/500m)