'muscular physique' is a correct and usable phrase in written English.
You can use it to refer to a strong and toned body shape. For example, "He had a muscular physique that most men strive to achieve."
His muscular physique is featured on billboards throughout the city and in advertisements in local magazines.
He tends to wear clothes that show off his muscular physique.
He has the muscular physique of an inmate who passes the time lifting weights.
She has short black hair and a muscular physique; she was once a competitive bodybuilder.
A muscular physique might just be a more important attribute when it comes to judging a person's leadership potential.
He returned to training last fall, and has worked hard to cultivate a leaner and more muscular physique.
A naked fellow, a model with a muscular physique, was stretched out on a table and getting a massage.
Beckett thought he was nice-looking: thick brown hair, dark eyes, a trim but not muscular physique.
With his appealing screen presence shaved head, muscular physique, raspy voice, and rough-hewn charm Diesel was soon working regularly.
A snap, taken by Liz the previous week at a rugby match, shows off his impressively muscular physique.
Furthermore, the increase in action figure dimensions may contribute to the multifactoral development of an idealized body type that focuses on a lean, muscular physique.
