ABSTRACT
Before experiment, in order to increase the success rate of experiments, the author of the experimental group and control group of 100 m and 200 m grades were tested, the results of test are analyzed and compared (see Table 1).
Before experiment, in order to increase the success rate of experiments, the author of the experimental group and control group of 100 m and 200 m grades were tested, the results of test are analyzed and compared (see Table 1).