Hi, this is a topic I’ve long thought about, and I’m more or less coming to the conclusion that walking by itself is not the thing that makes depression better. A half hour or full hour on the treadmill has done nothing for me. But a 10 to 15-min walk outside has done me loads of good. I can almost feel the happy hormones flowing through my body. And I’m realizing that the grass under my feet, the handsome (or ugly) stray dog urinating on someone’s geraniums, the clouds forming shapes of humpbacks or dragons or rather sensual images in the blue sky, the still-lit cigarette butt on a random street corner, a toddler crying for his mommy’s attention as she checks out a dress at a shop window…all these things I see on my daily walks — basically visual or auditory stimulation — is what reminds me what it is like to be alive.