Abstract
Through scientific research, it has been found that rapid weight loss significantly affects the physiological and physical aspects of athletes. Therefore, the researcher believes that the athlete's weight loss by this amount in a very short period leads to a "decrease in the physiological and physical condition", a weakness in the athlete's strength, reaching the stage of fatigue and exhaustion, and a negative impact on the level of physical and health fitness and performance level in the competition, which will also weaken his ability To resist and reduce his attention, as a sport requires the use of his maximum physical and psychological strength and ability to achieve victory and reach the highest levels. This research is considered within the applied research that the researcher hopes to benefit those interested in sports nutrition. The study is one of the recent studies dealing with the role of Carnitine in improving blood fats in athletes.
METHODS: This research is considered within the applied research that the researcher hopes to benefit those interested in sports nutrition. The study is one of the recent studies dealing with the role of Carnitine in improving blood fats in athletes.
RESULTS: The researcher attributes the statistical differences and the improvement rates of the group that used aerobic exercises in the variables under investigation to the effect of the training program applied to them, which contained exercises that resulted in a high level of those variables, and this improvement is due to the continuity of their regularity within the training program. Which led to the occurrence of the adaptation process in training and thus the rise in these variables.
Conclusions: The presence of significant differences between the previous and post-measurement of the control group in the measurements of blood fats. The valid post measurement of the boxing players in the Mansoura University team. There are differences in the rates of change between the pre-and post-measurements of the control group in the variables under investigation, the valid post-measurement, where the change percentages ranged from (3.885%) to (10.769%). The presence of significant differences between the pre-and post-measurement of the experimental group in measurements of blood fats. The valid post measurement is for athletes.

Key words: The Effect of Aerobic, Exercise with Taking, Improving Blood Fats for Athletes