Potassium plays a critical role in muscle function, particularly in maintaining proper muscle contractions and nerve signaling. It helps regulate fluid balance within cells, impacting muscle performance and recovery. Adequate potassium levels contribute to normal heart rhythm and support cardiovascular health. Insufficient potassium intake may lead to muscle cramps, weakness, and increased fatigue. It is essential for athletes and active individuals to ensure proper potassium consumption through sources like bananas, sweet potatoes, and spinach. Maintaining healthy potassium levels is vital for optimal physical performance and muscular health.