What characteristic of the Whippet’s physical structure is described as essential for providing the 'crucial spring' in its stride?

Answer

A powerful, flexible back that arches over the loin

The physical structure of the Whippet is a carefully balanced testament to aerodynamic efficiency, focusing heavily on components that facilitate explosive speed. The propulsion mechanism central to sighthound running involves the powerful, flexible back structure. This part of the anatomy coils and then powerfully extends, creating the 'spring' necessary for maximum acceleration and ground coverage during the fast-paced gallop. This spinal flexibility, inherited from the Greyhound, is paramount to their performance on the track.

What characteristic of the Whippet’s physical structure is described as essential for providing the 'crucial spring' in its stride?
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