Children have many advantages to learn swimming techniques, since they have much plasticity physiologically as psychologically, thus it is necessary to learn swimming from childhood.

The results suggested: The body and the arms had synergetic effect on producing the power and should be considered as a whole, the swimmer should be regarded as motionless object while water as active one when analyzed the swimming technique using op.

Analysis of the current state of the cultivation of backup talents for competitive swimming and its restricting factors in Liwan district and Dongguan city

Based on the modeling of dynamics and energy conversion in competitive swimming,the optimal control theory was used to make an optimization analysis of the distance traveled in a given time.

By analyzing the swimming result,superiority items and the age of the team of " 3+2 " provinces and cities in the 10th national games,this paper discovers the development characteristic and forecasts the tendency items of these provinces and cities,gives theoretical reference in continuable development of competitive swimming to "3+2" provinces and cities.

By analyzing the testing results,we found different training-strength has different influence on swimming skills and body-ability recovery,it can be used to test the development direction and result of training-strength.

Through making comparative analysis on the top three male and female swimmers at each event who participating in the national swimming match between 1996-2002, this paper discussed the reason of "the national games phenomenon" in our competitive swimming event and tried to put forward the solution on it.

By using the method of documentary and statistics, this paper analyzes the structure of international swimming, points out the existing questions of China swimming and puts forward some countermeasures: strength the Olympic strategy; build reserve base; adopt scientific training, etc.