This graph feels a bit fishy and / or more interesting than the presented result: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4372555/bin/pone.0122119.g007.jpg

This graph feels a bit fishy and / or more interesting than the presented result: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4372555/bin/pone.0122119.g007.jpg http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4372555/bin/pone... GE = w/ ADHD GE-EF = w/ ADHD and exercise GC = w/o ADHD GC-EF = w/o ADHD and exercise Look how poorly GC-EF performed relative to the other groups in absolute terms. There's visually a much larger difference in concentration for those without ADHD, but who exercised than those that didn't exercise. If we were to focus on the largest difference of effect shouldn't our conclusion be, 'Intense exercise can make the attention of people without ADHD worse than those with ADHD'? This is what the authors say, "The results of this study also show that the GC group has a performance that is 42% better than the GC-EF group. These data seem indicate that after an intense physical exercise, people without ADHD show impairment in attention performance. However, this hypothesis requires further studies, which include the assessment of the duration of this effect." Hmmm ..., color me a skeptical statistician.