Body Type / Frame Size

How this is worked out

This estimates **skeletal frame**, not somatotype. The ectomorph/mesomorph/endomorph classification is widely used as though it dictates how a person should eat and train; there is no good evidence a tape measure can determine that. This ratio supports only a rough sense of whether your build is slight, medium or broad — useful as context when reading an ideal-weight range, not for choosing a programme.

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