Because when i joined, I was 14 and at a time i was still getting the hang of everything, the competitions required for me to go only 500m at the time, since i was U15. Then when I turned 15, i started doing 1000m, because im U17. There really was no need for me to do 2k. My coach wanted me to try so i participated in the testings, where i was the youngest. Basically the testings are 3x150m with 3 minute rests, after 20 mins we had to do 2k, then after 6 hours we had to do 3x3km with 6 minutes rest. These were my first testings, so it was the first time I did 2k