Gretchen Reynolds writes the popular Phys Ed column for the New York Times and also contributes to the New York Times Magazine, O: The Oprah Magazine, Men’s Journal and Popular Science. She has won a number of awards for her writing and reporting, including two nominations for the prestigious National Magazine Awards. She is also the author of The First 20 Minutes: The surprising science of how we can exercise better, train smarter and live longer (Icon Books, 2012).