Lots of miles trying to get my Boston Qualifier. One thing I am noticing is that when you get this lean there is significant social pressure to put weight on. Every extra pound you carry is just that much more unnecessary weight to haul 26.2 miles. I already have more upper body muscle than most marathoner so I am doing my best to ignore the peer pressure.
I should add that the peer pressure is coming from my non-running friends and acquaintances. I look normal in a group of runners. From an evolutionary perspective being lean is normal. Random but interesting quote from Facebook in an optimal foraging thread:
"I've lived twice with the Maasai in recent years and when we see them we think they are underfed or undernourished and want to cry for them. They remind me they are optimal health and can walk or run dozens of miles in a day. Western/modern culture puts an amazing amount of pressure on society to be heavy and overeat."
- AB Dada