Definition: The underlying bone of the forearm is the radius bone. A long forearm is desirable as it can signify a long smooth stride. The radius bone on humans runs between the elbow and wrist joint. Any bones below the forearm on a horse are essentially equivalent to the bones of the hands and feet on humans. That is why it’s sometimes said a horse runs on its fingers and toes.
Examples:When looking for a horse with smooth gaits, choose one with a long forearm.