According to many studies, concurrent training has many benefits for the general fitness of the body, especially fat Loss. In fact, this article include a set of elements that explain the benefits of concurrent endurance-strength training in improving the efficiency of fat Loss, Starting with clarifying the effects of concurrent training on physical fitness, then understanding the balance between Intensity and volume in fat-reducing training, understanding the mechanism of fat metabolism in Concurrent training, as well as the benefits of endurance and strength training, and finally dealing with the benefits of improving Concurrent endurance-strength training by using the Periodization.