80/20 Rule?

The 80/20 rule is straightforward. About 80 percent of your running training should focus on easy efforts to build your aerobic base, while the remaining 20 percent should involve moderate to hard efforts. However, many recreational runners do the opposite, spending too much time in a gray zone of medium effort. This can hinder recovery and fail to build real fitness. Coaches often refer to this gray zone as the area where progress stagnates.

Easy running is essential for developing your aerobic base, which is the foundation for all other aspects of your running. It allows your body to efficiently burn fat, increase capillary growth, and handle greater volumes of training without breaking down. There’s no shortcut for this; the more fit you aspire to be, the larger your aerobic base needs to be. The 20 percent of your running that encompasses interval training, tempo runs, and hill repeats is where speed is developed. This hard work pays off because your easy runs facilitate recovery, ensuring you show up fresh for the challenging sessions.

To determine if you are running easy enough, you should be able to speak in full sentences. If running with someone, chatting should feel natural. When alone, try vocalizing a sentence out loud; if you're gasping for breath, it’s time to slow down. Many runners mistakenly believe that easy running is a waste of time, yet it’s quite the opposite. Some of the world’s fastest marathoners conduct a significant portion of their marathon training at surprisingly easy paces. Remember, easy running is not lazy; it is a smart approach to running training techniques.