Yes. It’s hard to run easy enough when you’re fit and not running 100+ miles a week, which is the level many high school and collegiate runners will find themselves in the summer months. You’re fit and you often feel good, so why not run a bit faster? Problem is the Kenyans don’t run this way on their recovery days and they’re pretty good; most elite runners training at altitude keep their easy days easy and some won’t even run a long run very fast for fear they’ll over-train.
Running easy on your easy days is a simple concept, yet many runners struggle with it.