I was so pleased with todays interval session. My aim (hopefully before christmas) is to get under 23 mins for 5k so today I decided to do 6 x 800m aiming to go under 3.40 per 800 (23min 5k pace) The inside 2 lanes on the track were blocked off (they often are in training) so I ran in lane 3 = 830m. Splits were 3.43/3.45/3.46/3.45/3.42/3.42. given those are for 830m I worked out that for 800m they would be roughly 8 seconds quicker so all between 3.34 and 3.38. I'm so pleased with both the times and the consistency too - and feeling hopeful now that my sub 23mins may not be just a dream.

thank you! track is effectively an elongated circle? so the further out you go the longer the circle is. somewhere between 7 and 8m longer per lane, although the exact amount varies from track to track (as lane widths can be anything between 1.22 and 1.25m)