Numerous reports show the importance of the muscles for the individual's well-being. Many researchers now also recognize the importance of muscles for the quality of sleep, even at a high age. Authors describe how activation of the strong muscles can be balanced with deactivation of the endurance. People suffering from insomnia showed significantly reduced blood BDNF levels, which is a signaling protein in the central nervous system. Physical exercise increases circulating BDNF levels and increases the amount of subsequent SWS waves, deep sleep. The strong muscle fibers increased in the older individuals, suggesting delayed age-related loss in muscle mass. Strong muscle gives an independent life at large and is important for relieving insomnia with increasing age. The author has developed and adapted exercises for today's modern humans. The importance of leg strength for sleep cannot be over-stated, that are important. The legs have the largest muscles in the body, but also the most endurances. The legs provide a balance pool for a secure sleep state.