Potassium is vital for proper muscle function, aiding in muscle contractions and overall cellular activity. It helps maintain electrolyte balance in the body, which is essential for the proper conduction of electrical impulses in muscles and nerves. A deficiency in potassium can lead to muscle cramping, weakness, and even paralysis in severe cases. Ensuring adequate intake of potassium-rich foods such as bananas, spinach, and sweet potatoes is crucial for athletes and active individuals.