Training Guide to Aim for Completing a Full Marathon - Title: Full Marathon in 3 Months! - Publisher: NHK Text - Training Menu: 5-Hour Goal & 7-Hour Goal On a personal note, I was already over 60 when I started running marathons. This is the book I picked up at the bookstore then. Although it came with a training menu, it was completely unknown to me, so I started with a half marathon. I practiced at half the distance of the 7-hour menu. After experiencing a half marathon, I challenged a full marathon. I was able to finish my first full marathon in under 5 hours. This was at the age of 68. (For reference, I am female) Therefore, there are folds on the menu page.