The two most important metrics in regard to racing or training are A) Time, and B) Intensity. If you were to ask a runner this question you would usually get the answer time and distance but this is trail running, right? If we were to focus on time and distance in a week a 100 kilometres on trails around the Riverhead Forest in the mud is going to be very different from 100 kilometres around the mountains of the Southern Lakes of Wanaka and Queenstown, which again would be different from 100 kilometres on flat, manicured well drained soil. If we bear this in mind, time and distance tells us very little. We actually need to know about time and intensity and the same is true of racing.