The aim of this study is to identify the effect of multi-track endurance training at the level of Galactin-3 and some physiological, physical and digital variables of long-distance swimmers - 1There are statistically significant differences between the averages of the pre and post  measurements at the level (Galactin-3) and some physiological, physical and digital variables of long-distance swimmers. - 2There are statistically significant differences between the averages of the pre and post measurements at the level of (Galactin-3) and some physiological, physical and digital variables of the long-distance swimmers control group.