Discover the science-backed exercises that slow aging. Learn why VO2 max and strength training are critical for longevity and how to build a simple weekly routine.
Marathon runners have lean legs due to their focus on endurance over muscle mass. Their training develops slow-twitch fibers, low body fat, and efficient aerobic systems. Unlike sprinters, they prioritize efficiency and stamina, not bulk. Understanding this science helps runners optimize their training for performance.