+10
Best advice I heard was 'do not go too hard on your easy days and do not go too easy on your hard days'. -Coach Troy (spinervals) along with many other people. John Parker Jr (HR training book geared towards runners) talks about it as well . . . 'no man's land' - the area between what a hard and easy session should be. Many people without a plan spend all their time inbetween and get the benefits of neither.