Prompt:

Create a detailed illustration of a muscular young man with short, dark hair and a serious expression. He is shirtless, showcasing well-defined muscles, and is wearing dark pants with a black belt. He is carrying a large, brown sack over his shoulder, secured with a strap. The sack appears to be heavy, as he is using both arms to support it. The background is a plain, light blue wall with a large, brown, shield-like object leaning against it. The man's facial expression suggests he is focused and possibly burdened by the weight of the sack. The overall style should be realistic with a focus on detailed muscular anatomy and expressive facial features.