The Influence of Sleep Quality on Athletic and Cognitive Performance in Chess

Abstract

This study explores the link between sleep quality and cognitive performance in adolescent chess players. Over five months, ten athletes aged 13–18 from clubs in Odorheiu Secuiesc and Târgu Mureș were assessed using the Pittsburgh Sleep Quality Index (PSQI) and chess problem-solving tests. Results showed a moderate sleep quality (mean PSQI = 4.4); competitive players, despite slightly poorer sleep, achieved better cognitive and sport performance. The Spearman coefficient (rₛ = 0.649) indicated a positive trend between good sleep and higher efficiency in focus and decision-making. Findings highlight the role of adequate sleep and sleep hygiene education in supporting mental performance and resilience in young chess players.