I read "Born to Run" over the Labor Day weekend. It's an
engaging and entertaining book and highly recommended.
Many remarkable characters are featured in the book and
among them are two (ultra)marathoners: Scott Jurek (42) and
Dr. Ruth Heidrich (78). Each has his/her own stories, "Eat
and Run" from Jurek and "Lifelong Running" from Heidrich.
Read about their life struggles and pay attention to their
diets. Be well.
P.S. I understand many people struggle with English. I don't
have the time to translate. Take this as an opportunity to
discover a world.