What you do with your arms affects how much energy you consume.

Around the time I started running, I happened to be reading James Joyce’s Portrait of the Artist as a Young Man, in which Mike Flynn, running coach to “some of the best runners of modern times,” instructs young Stephen to run with “his head high lifted, his knees well lifted and his hands held straight down by his sides.” I tried it; it was comically hard, and looked something like this. 585 more words