What are AFOs?

Ankle-foot orthoses (AFOs) are braces that encompass the ankle joint. The aim of AFOs is to stabilize the ankle joint by supporting the lower leg muscles. Nowadays most AFOs are made of carbon fiber. Carbon fiber is lightweight yet incredibly strong. In addition, the dynamic, spring-like properties of carbon fiber allow the AFO to store and return energy during walking. This energy returning supports the ankle push-off power, especially in case of calf muscle weakness.

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The effect the AFO has on walking depends on various factors, such as AFO design and stiffness. The effects of these factors and when to apply are discussed in the video's below and discussed here (AFO design types and AFO stiffness)