Building 90 minutes of stamina takes time, not intensity. Learn how steady movement, recovery, and smart nutrition help you last longer without burning out. No gimmicks-just proven steps.
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.