How the weird fake trails on treadmill screens help clear your mind

March Mindfulness is Mashable's series that examines the intersection of meditation practice and technology. Because even in the time of coronavirus, March doesn't have to be madness.  There’s an empty riverbed before me. It’s filled with shards of white stones, sloping downward at first and then slowly back up into the surrounding hills. I run through the flatness, looking around at the gray sky above, the rocks below, the horizon line which, pleasantly, never gets closer. And then the son...