It was this accumulation of grievances that led to the burst of the Mongol attack on Islamdom from 1200 that culminated in the sack and slaughter at Baghdad in 1258 under Hulagu Khan who was egged on to this path by his Nestorian Persian Christian wife.
Type IIx are best known as fast-twitch muscle fibers. These are the muscle fibers primarily responsible for fast, explosive movements like sprinting. However, they lack the endurance-boosting ability of slow-twitch fibers and can only be used for short periods of time.Type IIa are what we call intermediate fibers. These are a blend between fast-and slow-twitch fibers.hese are the muscle fibers primarily responsible for fast, explosive movements like sprinting. However, they lack the endurance-boosting ability of slow-twitch fibers and can only be used for short periods of time. Type IIa are what we call intermediate fibers.
The fast-twitch muscle fibers are known as the white muscle, while the slow-twitch muscles fibers are known as red muscle. These two types of muscle fibers are engaged differently depending on what type of activity you are doing.You can change the composition of your muscles to contain more red or white muscle fiber, depending on the goals of your training.uscle Composition. Every bundle of muscle tissue is made up of slow-twitch red muscle fibers and fast-twitch white muscle fibers. How much of each you have is determined in part by genetics; however, the fiber types can change with regular exposure to different types of exercise.