James Radcliffe has a theory about what is often referred to as the runner’s high: “that this waste product builds up over time, an accumulated detritus that collects in our bodies and spirits like sludge on a river – unless we process it in some way.”
I think this is insightful poetic imagery and exactly how I feel even from power walking. Thank you, James, for translating this euphoria into words. Your theory makes perfect sense to me.
P.S. I think you should submit this to a fitness magazine as it is more motivational than articles about the physical benefits of exercise. It is so much more than that.