What type of muscle fibers make up the core musculature and what type of contractions best suit these muscles?
a. slow twitch, type II muscle fibers; quick short-term contractions
b. slow twitch, type I muscle fibers; longer sustained contractions
c. fast twitch, type I muscle fibers; quick short-term contractions
d. fast twitch, type II muscle fibers; longer sustained contractions
Answer: B