An endurance athlete and coach reveals how the marathon transforms the lives of everyone who attempts it--and how it has helped his own family cope with serious adversity Step after step for 26.2 miles, hundreds of thousands of people run marathons. But why--what compels people past pain, lost toenails, 5.30 am start times, The Wall? Sports writer Matt Fitzgerald set out to run eight marathons in eight weeks across the country to answer...