When talking about muscle recovery, the first idea that comes to mind is: protein. Although nobody can deny that the importance of proteins in this process, it is not the only factor that must be taken into account. Several studies have confirmed that sleeping well is even more important. The constant lack of sleep not only generates the feeling of chronic tiredness. But it decreases sports performance and increases the chances of muscle fatigue. It also generates a bad mood as well as has negative effects on the immune system.