What is muscled?

Some articles on muscled:

Serbian Hound - Standard
... The body is slightly oblong, with a back that is well-muscled, long and powerful ... Forequarters are powerful, well-muscled and parallel with muscular shoulder blades ... The hindquarters are strong with well-muscled thighs ...
Karakachan Dog - Appearance
... Back Straight, broad and well-muscled ... Loins Of medium length, broad, well-muscled ... Tightly joined to the body, well-muscled ...
Cleveland Bay - Characteristics
... The breed has a large head, slightly convex profile, and a long, well-muscled neck ... The withers are well-muscled, which often makes them less pronounced, the chest is broad and deep, the shoulders are muscular and sloping, and the croup slightly sloping ... The legs are short in relation to the body, but strong and well-muscled ...
American Quarter Horses - Breed Characteristics
... Quarter Horse has a small, short, refined head with a straight profile, and a strong, well-muscled body, featuring a broad chest and powerful, rounded hindquarters ... stock horse type is shorter, more compact, stocky and well muscled, yet agile ... Quarter Horses are somewhat taller and smoother muscled than the stock type, more closely resembling the Thoroughbred ...
Formosan Mountain Dog - Description - Temperament and Behaviour - Standard
... Loin Firmly muscled ... Limbs Forequarters Shoulders Well muscled ... Hindquarters Hindlegs should be slender, with good bone, well muscled and parallel to each other ...