My 511th parkrun done this morning. I tried to take it easy and do the whole run in my zone 2, under 130 heart beat per minute. Cleveland is a pretty flat course so it was too hard to sit on about 6:30 kilometre pace and an average heart rate of 130. Ideally I would like to get my zone 2 down to 5:40 pace but that might take a bit more training and practice.