For an athlete, sleep and its quality are factors of great importance, which are reflected in recovery from training and promoting all the processes of healing and muscle reconstruction, with repercussions that can also negatively influence the endocrine-metabolic axis. Regexil is a supplement designed for sleep disorders, especially for insomnia due to external causes such as high-intensity workouts or overtraining, various kinds of psychophysical stress, or due to different time zones, work shifts etc. Regexil boasts a blend of highly effective microelements and plant extracts such as Valeriana, GABA, 5HPT, Camomile, Melatonin, Suntheanine, Passion Fruit extract and Magnesium in the form of Bisglycinate. These offer great support in regulating the sleeping-waking rhythm of those who have difficulty falling asleep or are subject to nocturnal awakening, hindering the time for true psychophysical relaxation and muscle recovery. The combination of elements contained in Regexil decreases the time needed to fall asleep, promoting higher quality rest, and makes use of innovative technology using triple-layer tablets with differentiated release. This ensures the gradual transfer of all the beneficial substances they contain in the various phases before and after falling asleep. While we sleep, our body positions itself in a position of reconstruction. Once subjected to training stimuli and provided everything it needs to heal, rebuild and supercompensate, it will be the moment of qualitative and deep sleep, the true restorative sleep that the body will work for muscle growth. We should remember that the value of sleep is as important as it is often underestimated for the entire state of health of the body, both for its composition and for metabolic and immune efficiency. Thanks to a deep sleep, both physique and mind are regenerated at the cellular level, fielding all those crucial functions for repairing and rebuilding muscles, and releasing important hormones as well as all those factors that will be promoted for improving the efficiency of the body s metabolic, immune and mental health. Very often the sleep factor becomes a real problem for the athlete in moments of great fatigue, in those most intense periods of preparation, when fatigue accumulates along with inflammation, stress increasingly puts the adrenals to the test, conditioning cortisol production in various ways, and it becomes difficult to relax the muscles and the mental state which will instead tend towards states of anxiety with likely changes of mood. Lack