600m x 10 (rest 2m) Target start is 2km pace plus 4. 2K plus 4 means that the pace for 500m shown on the monitor is 4 seconds slower than their average pace for their fastest 2000m effort (so for a 8:00 2K – the average would be 2:00 – therefore 2km plus 4 would be 2:04/500m)