Assertion: twitch muscle fiber | /r/HasProperty | type i
Facets:
Source sentences:
text: Slow-twitch muscle fibers (Type I) are oxygen-dependent and contract relatively slowly, but can contract for longer periods of time without fatigue.
text: Fast-twitch muscle fibers (Type II) are not oxygen-dependent and contract more rapidly than slow-twitch fibers, but tire relatively quickly (they also produce greater muscle power).