This is the 5117th most frequent Portuguese word.
muscular
Related to muscles; strong or well-developed in physique.
Here, 'muscular' is used adjectivally to describe the development pertaining to muscles.
Ele segue um programa rigoroso para o desenvolvimento muscular.
He follows a strict program for muscular development.
Here, 'muscular' modifies 'structure' to specify that the structure is related to muscles.
A estrutura muscular do atleta é impressionante.
The muscular structure of the athlete is impressive.
Here, 'muscular' is used to describe the type of discomfort, attributing it to the muscles.