If you've read either of Lance Armstrong's books, it's probably not a surprise to you that endurance athletes, to put it nicely, tend towards the thin part of the distribution in terms of normality.
Having said that, this woman is crazy. But in the good sense of the word. From her record-setting crossing of the English Channel at age 16 to her devotion to swimming in water that is 40 degrees or colder, Lynne Cox is a rare breed.
This is a very interesting read.