And here is what they found: the relapse rate of the group on medication only-38 percentout of the 60+ percent who got better returned back and had the major depression again, 38 percent, over a third;the group that did medication and exercise-relapse rate of 31 percent,just under a third of the 60+ percent who got better;relapse rates of the exercise group only-and remember they could continue exercise or not;that was entirely up to them-the relapse rate of the exercise only group, 9 percent.Remarkable results. Similar results earlier than the year 2000, all the way back in 1984 for dysthymia.Dysthymia is usually longer lasting, but less acute form of depression.So it's a deep feeling of sadness. Lasts for much longer than major depression. But also exercise helps this.Now when I first saw this study again there are dozens, there are hundreds of studies by now,replicating this phenomenon on different, different areas-as I'll talk about in a minute,I said, "wow! This is amazing!" So exercise is like taking antidepressant-seems like it.Exercise is like taking antidepressant. But when I thought about further, I realized that wasn't the case.It's not that exercising is like taking an antidepressant, it's rather that not exercising is like taking a depressant.