The ankle joint consists of the Tibia, Fibula, Calcaneus and Talus bones as well as muscles and ligaments. The calf is made up of 2 muscles known as soleus and gastrocnemius and join together to form the Achilles tendon at the back of the heel.
The ankle is essential for all activities involving mobility or standing. The calf muscles are the biggest muscles attached to the ankle and are responsible for strength, whilst the smaller muscles to the sides are responsible for stability. Weakness in the ankle can impair walking in particular the push off phase of walking or stepping, be that flat ground or stairs.
In cases of force or trauma, sprain can occur to the ligament on the inside of the foot known as the deltoid ligament. If the muscles are damaged or torn this can result on inflammation, pain or weakness.
Exercises with a theraband or bodyweight are a great way to rehab or strengthen.