I completely agree with HRE here, everytime.
There are so many examples of middle distance runners, running long, to list them would bring down the servers.
...again, the examples are endless.
I know so many examples of runners of middle distance that take shower everyday. So, to take shower everyday that´s the key to their results.
How many examples do you want from those who take shower but they are out of shape ?
How many runners do the long runs and they are out of shape?
How many examples of runners that DON`T DO THE LONG RUN BUT THEY HAVE MAJOR SUCCESS ?