The Balance of Strength and Endurance in Long Distance Running

Coaches often forget what their strength is by overwhelming them with work that is geared towards improving the uo weaknessi so like globaly. Even in the longest of long distance running races, its still how do i keep and maintain this balance yets. We're always adding, never subtracting, right? That's what we are balancing by focusing on certain things a little bit more than others. Certain qualitis are just as important to bring into sunset as they are to sunrise.