Foods that are high in potassium and beneficial for muscle function include bananas, sweet potatoes, spinach, and avocados. Potassium is essential for maintaining proper muscle contraction and overall nerve function, helping to prevent muscle cramps during physical activity. Other potassium-rich foods such as beans, citrus fruits, and tomatoes also contribute to a balanced diet. Ensuring adequate potassium intake supports hydration levels and can help mitigate the potential negative effects of high sodium consumption. Including a variety of these foods can promote optimal muscle performance and overall wellness.