1. The standard for leg length is not determined solely by the absolute length of the legs, but rather by the proportion of the body.
2. A common method for measurement is the truncated leg length index, which reflects the ratio of standing height to sitting height.
3. The formula for calculating the truncated leg length index is: (Standing height - Sitting height) / Sitting height * 100%, measured in centimeters.
4. Based on different ranges of the truncated leg length index, leg types can be categorized as extra-long, long, sub-long, medium, sub-short, and short.
5. Body proportion is not directly proportional to height; taller women tend to have longer legs, while shorter men tend to have shorter legs.
6. In the Chinese population aged 22-25, 0.4% have extra-short legs, 5.9% have short legs, 33.6% have sub-short legs, 42.9% have medium legs, 15.8% have sub-long legs, 1.3% have long legs, and 0.2% have extra-long legs.
7. This means that the majority of people have medium-length legs, while extra-long legs are quite rare.
8. The classification of legs as long or short is based on body proportion rather than length alone, which is crucial when assessing leg length.
