The mention of German Fernandez makes no sense, either.
Yeah, I don't know anything you are right I guess….I'm certainly not trying to appear to be the brains of the group here nor do I proof read and study all my posts to assure they impress everyone….so sorry if a bit confusing sometimes.
Let me explain. German Fernandez is a 4:09 miler and then some. He trains 50 miles a week, so much less than the original poster. He trains less and runs faster. Why? Because the good Lord gave him that talent. Is he a slacker because he runs 50 miles a week? No. His coach realized that he's young and MOST young runners should not be beating themselves against the wall running 70++ miles a week. He is supporting his running with some cross training in an effort to gain fitness through other forms of exercise (300 push ups a day). How many pro runners do ONLY running? Those that do are marathoners not milers. Most young runners don't start real high volume until late in college or after college in an effort to save their bodies. Once again MOST (see Josh McDougal).
So the mention of German Fernandez makes sense. In an effor to compare training vs. talent I used his name. All the training in the world won't get a 4:20 talent to 4:09. I hope the OP in fact has the talent to run 4:09. It takes a very very special individual to do so. I don't want to see the OP ramping up his training considerably in an effort to run faster. Less mileage for him could be a better fit as it is for German.