Oh? I was a decent recreational runner in my 20s, qualifying for the Boston Marathon three times between 1981 and 1985. But I could not train farther than abou

Oh? I was a decent recreational runner in my 20s, qualifying for the Boston Marathon three times between 1981 and 1985. But I could not train farther than about 60 miles a week, for beyond that I could feel injuries coming on.