Lydia Nader-Urdiales, a registered dietitian and endurance athlete, shares her expertise on weight loss for runners. She challenges common myths, emphasizing that weight loss can occur without jeopardizing performance or increasing injury risk. Lydia discusses the importance of body positivity, safe fueling during runs, and the complexities of weight fluctuations in marathon training. She also highlights the significance of nutritional quality, common pitfalls to avoid, and the unique nutrition needs of runners, urging a focus on health over the scale.