The ankle is under a lot of stress as we walk, jog or run. The estimate is three to five times body weight at heel strike walking, five to seven times body weight jogging at heel strike, and seven to ten times body weight at heel strike running. That's a lot of forces going through the foot and ankle.
Another fun fact, pronation and supination account for sixty percent of the shock absorption mechanism of the lower extremity. Needless to say we need to pronate and supinate to have effective gait mechanics.
The joint alignment is also a huge factor. If you have ever had an eversion sprain, there is a very high probability that the talus (Top bone in the foot) is not pivoting properly between the tibia and fibula. This can have a dramatic effect on the ankle, forefoot, knees and hips. We can restore function to this joint and an orthotic will support the improved function.
Orthotics can improve ankle pain in a number of ways:
They can change the distribution of force through the foot and ankle.
They can act as cushions to reduce the force through the foot and ankle.
They can change the alignment of the foot and ankle.
These actions can often times remove or at least alleviate ankle pain to a large extent.