1, performance standard of junior middle school boys in 50-meter dash.
(1) Excellent result is 7.5 seconds or less.
(2) Good grades take 7.6~7.7 seconds.
(3) The passing time is 7.9~9.7 seconds.
(4) Time longer than 9.7 seconds is considered as failure.
2, junior high school girls' 50-meter dash scoring standard
(1) Excellent result is 8.0 seconds or less.
(2) Good grades take 8.4~8.7 seconds.
(3) Pass the product of 8.9~ 10.7 seconds.
(4) Time longer than 10.7 seconds is considered as failure.
Running skills
50-meter running training is monotonous, which is a headache for many parents and students. The 50-meter race is an event that pays attention to speed and explosiveness. To tell the truth, there is no shortcut to improve your grades, which can only be achieved through long-term targeted practice.
Whether the students in the senior high school entrance examination can master the reasonable and correct movements and essentials is the premise to improve the 50-meter score. The specific technical forms are: the running action is stable and the fluctuation of the center of gravity is small; The movements of the upper and lower limbs are coordinated, and the swing arm of the upper limb is active and powerful, "not exposed in front of the elbow, not exposed behind the hand", combined with the pedal swing of the lower limb to promote the pedal swing; Both forward running and straight running are good, and the whole process has a good sense of rhythm. During running, keep relaxed, fully open the hip joint, and try to lean forward for the first 20 meters.