The Achilles tendon, stretching from the heel bone to the calf muscle, is one of the strongest and longest in the body. It is responsible for the ability to extend the foot and point the toes. On average it is around 15 centimetres long and 6.1 mm in thickness in people aged 10-17 years, 6.3mm in people aged 18-30 years, and 6.9 mm in people aged over 30. It tends to be more flexible in women and the young, and…