A large sample of middle-mouse corridors analysed their commitment, their negative addiction and their main training habits, as well as the influence of the latter on their dependence. In addition to valuable data describing their training habits, commitment was found to be high, especially in women, and average negative addiction, with no significant gender differences and less than previous studies in Maratonists. From the descriptive data, it is concluded, on the one hand, that the greater commitment of women than men is due to the longer time spent on training and, on the other hand, that the lower negative addiction is due both to the greater concern that they are looking for trenator and years of training and to the lower number of kilometres and days of training per week of midmarathon corridors than marathon corridors. The following analyses conclude that the variable that seems to be most important for why a medium-marathon corridor moves from being well committed to its sporting practice, to being pathologically addicted to it, is the number of kilometres entering each week, since if it is low for both men and women, a healthy commitment is increased, whereas if it is high, men increase their negative addiction. In the case of women, ADE- more than the aforementioned weekly mileage has proven to be a decisive factor in increasing the commitment and reducing addiction.