I know it may not seem like it, but I have hypothesized that Phyllis from the popular US comedy, the Office, would be an excellent long distance runner. I know from the outside it doesn't look like it, but she has the ideal running body She has enough sprint speed to accelerate quickly and her "larger" body will give her momentum to keep moving efficiently. She weighs 210 pounds and is 5'10 feet. If you have a similar body type please contact me at runrunisfunfun@gmail.com and I will help train you to run a sub 2:30 marathon.