Strength training can be defined as the use of resistance for contracting muscles with the objective to acquire strength, size and anaerobic endurance of muscles. If performed correctly, strength training can influence the improvement of overall health and well-being, as well as the increase of bone strength, the health of muscles, tendons and ligaments. It reduces the potential for injury and improves the heart function. Whenever we want to get rid of excess fat, an intensive training is not equally effective for all people. Scientific research studied people who had gone through a 12-week intensive training program. After finishing the program, some people had gained approximately 6 percent more subcutaneous fats. This phenomenon is proven to happen due to our genetic makeup that influences our susceptibility to certain physical exercises. In case of women, these findings are not confirmed. This is not surprising, because both men and women have a completely unique system of fat accumulation and fat-burning.