The Achilles is the largest and thickest tendon in the body. It is made up of Type 1 collagen fibres, tenocytes, and proteoglycans which are responsible for the tendon’s tensile strength. These complex interwoven fibres merge from the calf muscles, gastrocnemius and soleus to form the tendon that inserts into the heel bone, the calcaneus. The Achilles is involved in 93% of the plantar force in flexion of the foot. When healthy, this tendon can handle up to nine times the body weight and has a pivotal function in transmitting forces, such as explosive power and control of movements.
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