From one glance at 龟龟li’s works, you can tell the artist likes paying extra attention to muscles. Take this male anatomy study, for example, you can witness the evolution of the sculpt from simple shapes to an extremely detailed body.
The model, created with ZBrush, I assume, can be a nice reference for other artists trying to grasp male proportions.
龟龟li doesn’t only work with men, their ArtStation portfolio has female characters as well, often as muscular as this study.
