We found differences in clearances among all six brain regions in all three age ranges. Pre and post exercise results also differed. The three AD subject pre-exercise clearances were flatter, distinctly outside the range of normal subjects in all brain regions. Post-exercise in AD group was uninterpretable due to unachievable target heart rate. Descriptive statistics (means, standard deviations, effect sizes) were computed at each level of exercise (pre, post, and change (post-pre), for each section, each age group, and for each brain region in both non-dominant and dominant hemispheres. Cohen’s d effect size was computed for paired differences between pre and post measures (d=0.20, small; d=0.50, medium; d=0.80, large).