In the sports performance setting, studies have shown that better recovery and sleep quality positively influence sports performance, motivation and concentration as well as the general physiological and psychological capability (Chandrasekaran, Fernandes, & Davis,
2020). Furthermore, high sleep quality positively affects the circadian rhythm, and the hormonal and immune system, while decreasing perceived exhaustion and pain perception (Walsh et al.,
2020). In contrast, sleep disturbances negatively affect mood and cause a decline in fine motor skills, maximum strength, and aerobic performance (Fullagar et al.,
2015). Further, stress as well as cognitive and physical exertion negatively influence the regeneration process, in particular the process of falling asleep itself. In this context, Kellmann et al. (
2018) have demonstrated the risk of short-term performance losses up to long-term health consequences due to the negative combination of stressful factors, low resources, and bad sleep habits in terms of sleep quality and sleep duration. However, many professional athletes sleep less than the 7–9 h recommended by the American Academy of Sleep Medicine and the German Sleep Society leading to an accumulation of sleep problems in athletes (Kölling, Duffield, Erlacher, Venter, & Halson,
2019; Nedelec, Aloulou, Duforez, Meyer, & Dupont,
2018). Especially before competitions, high arousal and fearful thoughts seem to appear more often. For instance, Lastella, Lovell, and Sargent (
2014) have shown a variance of 4–5% in mood and general well-being after bad night sleep. To carry out this important role of sleep quality, detailed and holistic sleep assessment and treatments are needed (Claudino et al.,
2019; Halson,
2019). Hence, an increased awareness and tailored optimization of athletes’ sleep behavior might foster sports performance (Bonnar et al.,
2018).