Black athletes are good at explosive sports, which is closely related to their muscle composition and structure. Muscle tissue is divided into white muscle fibers and red muscle fibers. The former is also called fast moving unit. During the rapid and explosive exercise, it is mainly white muscle fibers that get exercise. The proportion of black and white muscle fibers exceeds 80%, far exceeding that of other races. In addition, black muscles are long and have good relaxation coordination, and the extremely low fat tissue content can also reduce the friction effect of muscles during contraction and relaxation.

In addition to muscle function, blacks also have outstanding thermoregulation ability. During strenuous exercise, due to the acceleration of metabolism and the increase of body temperature, the ability of body temperature regulation plays an important role in maintaining internal environment stability and electrolyte balance. Black players can adapt to normal body temperature faster than other races. In addition, research shows that good thermoregulation is helpful to improve the efficiency of muscle tissue.

Physical characteristics advantage

Black people have some unique physical characteristics, which make their explosive advantage more prominent.

Black people have short trunks and long limbs. Some surveys show that black people's lower limbs, especially their calves, are longer than those of other races. The higher center of gravity reduces the stability angle of black chess players, which is beneficial to fast and flexible movement. Slender legs are also convenient for obtaining a larger linear velocity at the extremity. It is worth noting that the achilles tendon of black people is very long, and the strength of plantar flexor is the highest among all races, which makes them gain greater reaction when they start to push the ground and gain an advantage when they start.

Black hips are upturned, which increases the length of hip and leg muscles and produces greater contraction force. Muscle with increased length can also increase the action time of contraction force on legs. This feature enables black chess players to obtain excellent sprint ability and bounce ability. In addition, black toes also have some distinctive features. Their second toe is the longest, their calcaneus are bigger, their arches are more curved, and the fat tissue on the soles of their feet is soft and thick, which makes their feet look like a pair of hot wheels, with good elasticity.