Muscle from Positype

Muscle Wide Italic, Narrow, and Narrow Italic.

Christopher Slye, writing for Typekit:

Muscle works best when your goal is to coat the page or screen with as much (actual or virtual) ink as possible. Strangely legible if you set it large enough, Muscle adds heft to word marks and short headlines, and works particularly well in designs where color plays a leading role. Check out both the Narrow and Wide variations—and their italic companions, which seem quite comfortable leaning to the right.