Despite always having loved running for its own sake (see The Earth at My Feet for the story), I was so motivated by achievement and competition when I was younger and competing in high school and college that it sometimes worked to my detriment. Often, I went into competitions having “left my race on the training track,” so to speak.
I was well aware of the value of longer, slower, “mileage”-based training (i.e., what is sometimes termed LSD or “long, slow distance”) to lay a distance base, to be complemented by faster interval-based workouts — either concurrently or later in the training cycle. However, once the competitive season got underway, I/we (my teammates as well) still often overdid the latter at the expense of the former.
This was not entirely of my own choosing, since too much hard track-interval work was thrust upon the distance runners by coaches who didn’t know any better. However, even had I been entirely on my own, I still would probably have overdone it to some degree.
In high school — this being the era of the 1970s when 100 miles per week for national and world-class runners became the holy grail of training — I put in as much mileage as I reasonably could, given my teenage, still-maturing body. At that time I was averaging about 50 miles per week over the course of the entire year, but the weekly mileage distribution was bimodal. I piled on more miles in the off-seasons when training on my own, at least 60 and sometimes 70 or 80 miles per week. But during the competitive seasons (about two and a half to three months each for cross-country in the fall, and track in the spring) I could only manage about 40 miles.