There is no single leg shape that everyone should aim to achieve. Healthy legs can look very different, and appearance alone does not determine strength, mobility, or physical fitness.
Chapter 3: Understanding the Different Shapes
Some common descriptions of leg shape refer to the alignment of the knees and lower legs.
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Relatively straight alignment: The knees and ankles appear to follow a fairly straight line when standing naturally.
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Bow-legged appearance: The knees remain farther apart when the ankles are together. This is often described as genu varum.
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Knock-kneed appearance: The knees angle inward and may touch while the ankles remain apart. This is known as genu valgum.