According to the researchers' test, black muscles are long, connective tissue is developed and adhesion is good. In the process of contraction and relaxation, the black muscle is not easy to deform, so the Zhang Chi coordination of the black muscle is good. This excellent physiological function of muscle can increase the toughness length of muscle before contraction and reduce exercise consumption and muscle fatigue. In addition, there are more white muscle fibers (fast muscle fibers) and less red muscle fibers in black muscles. According to the researchers' test, black people's fast muscle fibers are as high as 85, which can produce strong explosive force quickly when people exercise, and are very suitable for fast explosive track and field sports. Black people's feet are different from those of other races. Other races have long thumbs, large calcaneus, well-developed soles and strength 150. Yellow race 100 kg, Caucasian 50 kg, long achilles tendon with black feet and big arch. The whole foot shape is like an elastic "bow" that Zhang Fu has. This kind of "bow" foot has strong bouncing ability, small vibration when landing, good cushioning performance and good flexibility. The blackbody has developed blood vessels, high blood acid concentration and rich cells, and the human body is red when exercising. The physiological function of black people to maintain acid-base balance in the body is higher than that of other races, which ensures the exercise potential of the body. The black 7O type is (), while the athletes with () blood have good strength, powerful movements and fast frequency, and the nervous system that controls the motor muscles is easy to concentrate. It can also be seen from the appearance that black people have the structural characteristics of short trunk, long limbs and high center of gravity, which meets the requirements of fast and flexible track and field sports. Black people's hips are obviously upturned, and their explosive power is strong, which meets the requirements of track and field 100 ITI for sudden start and strong bounce. In the 100 meter race, we saw that all black people were like runaway wild horses with super running speed, strength and endurance. Because of its special physical structure and physiological function, black people have inherent advantages in sprinting, middle-distance running and jumping with fast speed, strong explosive force and good jumping ability. Of course, we can make ourselves strong through the efforts of the day after tomorrow, but on the whole, the physical talent of yellow people is still not as good as that of black people, and the efforts of the day after tomorrow can still make up for the congenital deficiency.