Figure 2.

Mean changes over the course of the training in (A) fitness (aggregate measure of VO₂max and VO₂AT) and (B) neural specificity. Whereas fitness increased reliably from pretest (light gray) to posttest (dark gray), changes in neural specificity were not significantly different from zero. For both measures, changes in the LI training group (left) were not reliably different from changes in the HI training group (right). Error bars depict the standard error after removing between-person variability (Cousineau and O’Brien, 2014).