Authors: Spencer, M., Losnegard, T., Hallén, J., & Hopkins, W. G.

(2014). International Journal Of Sports Physiology & Performance, 9(1), 5-11.

Reviewed by Leo Thornley

Spencer and colleagues show that even in a sport such as cross country skiing, where events occur at different venues on different terrain and under different conditions, performance can be predicted and understood. The key to understanding performance is collecting good performance data. Once analyzed appropriately, inferences can be made about performance changes and whether they are on track, whether training interventions actually made a performance difference or not and even about how a junior athlete is progressing. (Spencer & Losnegard, 2013).