I found some shots of my Dad from his running era circa 1970's. He was pretty quick back in his day, and he got his marathon time down to 2:27 in Singapore Marathon of '78. He did most of his running in Singapore when he was posted there for the military. I hated running 10km once in Singapore because of the heat, I don't know what would entice you to train for a marathon there! A few ultras later he busted his knees and never ran again.