Zeb is right.
From years of observation the club sprinters who train at my local track three times a week show no obvious changes in physique and if they are just average sprinters they often do not have particularly impressive bodies.
The idea that transient increases in GH caused by sprinting will lead to increases in muscle mass is fanciful.
A lot of the wilder assertions about the physique benefits of sprinting come simply from the association
with the sport of elite level sprinters with muscular bodies. It is not causative.