A tendon rupture is when a tendon is completely torn in two. The Achilles tendon is located on the back portion of the foot just above the heel. Your Achilles tendon is the largest tendon in your body; connecting the muscles in the back of your lower leg to your heel bone (the calcaneus) and must withstand large forces during sporting exercises and pivoting. This tendon is vital for pushing off with the foot.
Two main types of Achilles injuries are overuse and inflammation, called Achilles Tendonitis, and tear of the tendon.
Often occurs when you rapidly increase the intensity of training or start new types of training when your body is not fully conditioned. You may experience mild pain after exercise that gradually worsens. Mild swelling, morning tenderness, and stiffness may also occur, but may improve with use.
Your Achilles tendon may tear if it is overstretched. A tear may be partial or complete. A snap or crack sound may be heard at the time of injury. Signs of an Achilles tear are pain and swelling near your heel and an inability to bend your foot downward or walk normally.