i Register
In some senses, musclebound is marked as derogatory, figuratively. Watch for register when choosing this word.
adj
Having pronounced muscle development through weightlifting, bodybuilding, or other physical exercise.
Work til you're musclebound all night long / Gotta work til you're musclebound all night long
Having excessive muscle (sometimes with implications of correspondingly inferior intellect).
Ungainly as a result of muscle over-development.