Hydration is one of the most overlooked yet vital aspects of running performance. Dehydration can lead to fatigue, muscle cramps, and reduced endurance, making proper fluid intake essential for success. Runners should drink water consistently throughout the day, rather than consuming large amounts just before a run. Electrolytes such as sodium, potassium, and magnesium play a crucial role in maintaining fluid balance and preventing dehydration-related issues. During long-distance runs, consuming sports drinks or electrolyte-infused water helps replenish lost minerals and sustain energy levels. Temperature and humidity also influence hydration needs, with hotter conditions requiring increased water intake. Understanding the signs of dehydration, such as dizziness, dry mouth, and dark urine, can help runners take preventive action. Developing a personalized hydration strategy based on individual sweat rates and training intensity can significantly enhance endurance and recovery.