Freestyle has several advantages, such as relatively reasonable movement structure, relatively small body consumption and relatively small resistance in water. It is by far the easiest swimming posture to improve the speed. However, in the process of cultivating college athletes, many teachers and students think that the teaching and learning of this sport are very difficult. The reason is that the key points of its competition technology are not clear.

1. What skills do college athletes have in the 100 meter freestyle competition?

(1) water inflow time

Competition time includes reaction time, residence time and air residence time, which are three important parts, and the quality of each content will have a direct impact on the final competition result [6]. Judging from the starting reaction time, the college 100 meter freestyle needs a shorter reaction speed. The initial reaction time is marked by the formation of arm stretching, which is also called the potential reaction stage. The main reference is the time of brain reaction and signal transmission, including the time of sensory organs receiving stimulation, the time of brain center processing information, and the time of nerve and muscle conduction reaction. The reaction time is also affected by this aspect.

(2) Before water action

It was more scientific and standardized before the water came out. For 100m freestyle, it is very important to master the technical essentials within the range of 15m before going out. This distance is faster. At present, the most effective method is to reduce breathing within 15m after entering the water, and kick the butterfly leg 2-3 times first. When the body stays 30cm away from the water, the butterfly leg will be converted into a freestyle kick, and then the arm movements will be connected at the fastest speed. The reason for this is that the lactic acid accumulation in the body before the water comes out is zero in the range of 15m, which is more convenient to accelerate and make the swimming process get a greater initial speed.

(3) Steering efficiency

The improvement of steering efficiency is very important. Turning and touching the wall will bring the final and most direct impact on the result of the game, and how to grasp this key turning opportunity is related to the coordination of various tissues and structures in the process of touching the wall, especially the choice of the best force position of muscles. In addition, the choice of turning angle is also a problem that must be considered. When the knee joint curvature is 1 15 2, the maximum pedaling force may be formed, thus greatly saving the time of touching the wall and achieving the best turning effect.

Second, the technical summary of college athletes 100 meter freestyle competition

(1) freestyle technique is developing in an increasingly fine direction, and its competition movement technique is always improved in the direction of reducing resistance, which is not only a good thing for college athletes, but also a great challenge. Because 100m freestyle pays more attention to the specialization of training methods and the characteristics that distinguish this event from other events.

(2) Therefore, both teachers and scholars should pay more attention to theoretical analysis and practical discussion.