what are three types of muscle fibers
Photo Credit Digital Vision./Photodisc/Getty Images. Your skeletal muscle contains two types of muscle fibers: fast-twitch and slow-twitch. Your fast-twitch and slow-twitch muscle fibers are separated into three distinct types.Slow-twitch fibers contain type 1 muscle fibers, while your fast twitch fibers contain both type 2a and type 2b.The percentage of each muscle fiber differs among everyone, and from one muscle to another in the same individuals, according to Fitness: The Complete Guide, by International Sports Sciences Association.hoto Credit Digital Vision./Photodisc/Getty Images. Your skeletal muscle contains two types of muscle fibers: fast-twitch and slow-twitch. Your fast-twitch and slow-twitch muscle fibers are separated into three distinct types.