It appears that you wish to know the between-run variation in power within a single individual, so you can relate that figure to the variability you see in field testing. The data in the paper, however, represents the between-run variation in power across multiple individuals. Furthermore, each individual only did a single run under a given condition (i.e., speed and direction).

Now if it is the within-run variation in power (either within or across individuals) that interests you, you can't determine that from the data either, as only the average value was used in further calculations.