As an athletic sport ,the improvement of the finswimming greatly depends upon the physical trength,sports skills and good psychological quality of the swimmer,sports apparatus and water dynamic performance.With the continuous imoprovement of the sports apparatus,how to improve and perfect the training methods is an urgent problem to be solved for the finswimming. Physical strength and skills of a swimmer will directly affect whether a swimmer can bear large amorunt of training,and whether the training level and special achievement can be further improved. The special trainings for the finswimmers include the followings: 1.Trainings carried on the basis of the sport physiology and sport biochemistry (including trainings on   speed, speed stamina and endurance). 2.Special strength training. 3.Special skill training. 4.Pliability training. 5.Swimmer's muscle relaxation training. The following is a brief introduction to the training classified according to the sport physiology and sport biochemnistry,and the method to develop speed,speed stamina and endurance,and the function of the muscle relaxation training. There are five kinds of trainings classified according to the physiology: 1.Speed training:Training to make the speed reach the limit.Try hard o increase the speed at a distance   between 25m and 50m,especially improve the ability of fast muscle fibre contraction. 2.Training on max.assimilation of oxygen(mainly for improving stamina):To make repeated trainings with   80% to 90% of the max.strength at a distance between 50m and 100m. 3.AT-type training(mainly for improving stamina):The meaning of AT is to adjust the motion strength to   the best point between the oxygen motion and no-oxygen motion. 4.Lactic-acid-resisting training (mainly for improving speed):To increase the adaptability for fatigue   caused by the lactic acid (because the lactic acid causes fatigue to the people). 5.Training on match mode (mainly for improving the comprehensive ability for main match distance):To use   the same speed like the actusl match during training.The different energy producing modes are also the   same as that in the actual match. Method of developing speed: There are many kinds of methods to develop speed.It is better to carry out training in short-distance r-unning like 50m,60m and 100m:quick running starts from 15m.Quick swimming shall be done at 15m,25m,35m and 50m on the water.During training to develop speed,attention should be paid to increase the function of the heart,lungs and respiratory sysytem. Function of the relaxation training During training,whether the muscle is relaxed properly and timely will have a great affect on muscle co-ntraction.When there is on muscle relaxation,there is no powerfull contraction of the muscle.We shall not only pay attention to imporoving the quick contraction ability of the muscle but also to improving the q-uick relaxation ability the muscle.Therefore,relaxation training shall be arranged for each training so as to cultivate the sportsmen to have a good habit of relaxation.Special relaxation training can be done just before the completion of each training.Training may also be arranged during each training.Relaxation must be done after large amount of training is completed.