Inadequate nutrition can impair athletic performance by leading to insufficient energy levels, decreased endurance, and impaired recovery. Without the right balance of macronutrients—carbohydrates, proteins, and fats—athletes may experience fatigue, muscle breakdown, and a compromised immune system. For example, low carbohydrate intake can hinder glycogen replenishment and negatively affect performance during prolonged exercise. Inadequate vitamins and minerals can also impact overall health and performance, highlighting the importance of a well-rounded diet tailored to an athlete's needs.