Thanks, I did have a great-for-me Chicago this year. Won my 45-49 age group, 5th place masters for a pay day, and a small PR at 2:30:45.
I am not ruling out strength work, but I am not sure that I will do it. I am honestly just really lazy when it comes to anything other than running. Plus, like most people in their 40s, I have a lot of different demands in my life that I am trying to balance - work, family and running - so I can only dedicate so many hours to running. Given that I have been mostly focused on the marathon the last 5 years, I have dedicated whatever time I have for running to mileage and workouts. I should do some little exercises around my house at night when my wife does hers, but I just can't get myself to do it.
Given that I am leaving the marathon behind for a while and going to focus on the 5k to half marathon distances, I might be able to strike a better balance and do some strength training. I aspire to, but my discipline on that front is not nearly what it is when it comes to running.
My college base really wasn't all that great - I didn't start running until my freshman year of college, so my mileage was low by necessity - 40 mpw to start and it never really got above 55 mpw except for a handful of times - and I was not consistent in my training the first couple of years (not training over the summer at all after my freshman year and very little my sophomore year). There was a cumulative effect by the end, but it took all 4 years and two years of consistent 50-55 mpw before I had that breakthrough. As a masters runner, my mileage has been higher because I am racing longer distances now, but it did take a couple of years of consistent mileage before I had a nice breakthrough again.
Which brings me back to the underlying point of the OP. I think he is really getting at the fact that he suspects a bunch of doping at the masters level. The test that I like to use is to take the guys who are performing well and who strike me as maybe being a little too muscular for a distance runner and look at the current times as converted to an open time based on the age grading formulas. If those converted open times are significantly better than their lifetime PRs, that will make me want to ask more questions. This works better the younger you are. When you get to the later age groups, the swings tend to get bigger and bigger. But if you have a 45 year old guy running the age adjusted equivalent of a 14:10, and his lifetime PR isn't or is barely sub 15:00, then I would want to ask more questions.