Douglas Harper's Etymology Dictionary
Wiktionary
a. (alternative form of musclebound English)
WordNet
adj. having stiff muscles as the result of excessive exercise; "he arrived accompanied by two muscle-bound body guards"
Usage examples of "muscle-bound".
It had a certain aesthetic appeal, however, at least to someone who prefers the lean grace of early classical Greek sculptures such as the Discobolus to the muscle-bound athletes of the later Hellenistic period.
I'm sure my beefy buddy up front was tickled down to the tips of his muscle-bound toes.
It belonged to a muscle-bound type in cross-gartered hose and a leather apron, with an interesting assortment of soot smudges and singed hairs in place of a shirt, and an even more interesting hammer-a squarish block of iron with an oaken handle.
Marci's current live-in boyfriend was a guy named Brick, a big, muscle-bound oaf whom none of the other three liked.
Krueger was the team's second machine gunner, a blond giant who carried the bulky M-60 slung over his shoulders, and wore crossed ammo belts which gave him the air of a muscle-bound hero of some paramilitary movie epic.
He's naught but a muscle-bound slave catcher for some besotted fool in Shadizar.
He wasn't a muscle-bound hulk, but the steeliness of his body was evident.