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 those that have less endurance but have the most strength and power and grow the biggest. When you pick up a weight and do a biceps curl, the slow-twitch muscle fibers in the biceps are recruited first to contract and then lift the weight.