الملخص
The study aimed to use the exercises according to the training stresses the anaerobic threshold distinguishing and see the effect of this exercise in lactic acid grouping (OBLA) and electrical muscle (wave height and an area under the curve).The researcher has used for that sample Mayor number (7) Rakdan of Rakda 400-meter freestyle applicants as he used the experimental method as a way to solve the problem and use a number of tools and instruments and devices and tests was the most important use of exercises according to the training threshold distinguishing anaerobic and format of the training program measures in terms of application components Training, where he was training for 10 weeks and three weekly training modules and a time of from (60-90 d) After a tribal tests and tests a posteriori researcher reached several conclusions was the most important:- Set of exercises on the basis of the threshold distinguishing anaerobic exercises significant effect on the concentration of lactic acid ratio towards carrying values of muscle acid to Rakda 400-meter freestyle.- Set of exercises on the basis of the threshold distinguishing anaerobic exercises significant effect in the electrical variables (Summit and area under the curve) in a sample search.The recommendations was the most important: