The Russian Blue is a robust breed, with firm muscles and an overall dose of good looks. It is physically in the same class as the Korat and Oriental Shorthair -- long, slender, elegant. It is of a medium size, and muscular, but compared to a swimmer in the compactness of its musculature. When it is in full motion and stretched out, one can see that it has a long, graceful neck, but the neck is hidden by thick fur and high set shoulder blades when the cat is sitting, making it look as though it has a short, thick neck.
Rapid breathing (tachypnea) is a respiratory disorder characterised by abnormal breathing that is rapid and shallow.  It is caused by a reduced level of oxygen, mechanical disorders (where the lungs aren’t able to expand as they should, usually due to a build-up of fluid in or around the lungs), and physiological disorders in which the cat’s respiratory centre in the brain is over stimulated.