If you were running a marathon, which of the following type of muscle fibers would be most useful to you?
A. slow-twitch
B. fast-twitch, type I A
C. intermediate-twitch, type II B
D. slow-intermediate twitch, type I B
A. Slow twitch These fibers assist in movements that are not fast but are continued for long periods of timeĀ and require enduranceĀ such as marathons.