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Anatomy The calf muscle  (called the triceps surae ) is the large muscle on the back of the lower leg . It has two main parts: the gastrocnemius muscle , which attaches above the knee to the thigh bone (femur), and the soleus muscle , which attaches lower down to the fibula (the smaller bone of the lower leg). Both muscles join together to form the Achilles tendon , which attaches to the heel bone . This tendon also connects with a structure under the foot called the plantar

Anatomy – Understanding the Ankle The ankle (often called the “ankle joint”) is made of two main joints: Upper ankle joint  – allows your foot to move up and down . Lower ankle joint  – allows your foot to move side to side . Together, they make your ankle move freely in all directions. The upper joint is formed by the shinbone (tibia)  and outer leg bone (fibula) , which create a “fork” that holds the ankle bone (talus) . This fork can slightly adjust its shape to allow smoo

What it is This condition means that the tendon of the long head of your biceps (the upper arm muscle) is irritated or inflamed. The problem can be caused by an injury or by repeated overuse — small strain after strain over time. Usually, this issue isn’t serious, but because it can stop you from doing sports or daily activities, it’s important to treat it properly. Anatomy (How it’s built) The biceps muscle has two parts: The long head  (which has a longer tendon) The short