The mineral essential for muscle contraction is calcium. Calcium plays a pivotal role in the contraction and relaxation of muscles by facilitating interactions between actin and myosin, the protein filaments responsible for muscle movement. When a nerve impulse stimulates a muscle, calcium is released from the sarcoplasmic reticulum into the muscle fibers, allowing contraction to occur. Adequate calcium intake is vital for maintaining proper muscle function and reducing the risk of cramping and discomfort during physical activity, especially in active individuals and athletes.