Fig. 1.

Mean Visual Analog Scale of Fatigue (VAS-F) scores for each group. The data from the GWI group is plotted in red and the data from the controls (HC) is plotted in blue. Error bars show the standard error of the mean. The VAS-F scores were acquired before and after each of the four runs of the task (denoted in the Figure with the words Run 1–4 in grey). The VAS-F scores of the GWI group increased across the four runs of the tasks while the VAS-F scores of the HC group remained fairly stable. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)