[veritas718]

This is one of those teachable moments; The administration of this experiment may have affected the results. After the first 4 months there was no change, and after 12 it was slightly worse for those who were made to exercise. Maybe the disruptive nature of the experiment ended up affecting the subjects' mood. Maybe those who were just asked questions found the light interaction pleasurable, staving off deterioration just slightly. The results are weak at best and completely biased at worse.