I feel a lot of pain if I walk/standup for more than five hours. I experience difficulty in walking up or down the stairs without the aid of rails. If I rest for more than 24 hours it seems to go away until I go to work again. The tendons affected are Tibialis Anterior and Inferior Extensor Retinaculum.
The problem seems to be hereditary, because my sister, brother and father are starting to feel the same.