The Achilles tendon is a strong band of tissue that connects the calf muscles to the heel bone. It plays a crucial role in walking, running, and jumping by helping to lift the heel off the ground. Named after the Greek hero Achilles, this tendon is the largest in the body and can withstand significant stress during physical activities. Injuries to the Achilles tendon, such as tendinitis or ruptures, can cause pain and limit movement. Proper stretching and strengthening exercises can help maintain its health. Athletes, especially runners, should pay attention to their footwear and training techniques to prevent injuries to this vital tendon.