The Relationship Between Sleep Quality Heart Rate Variability (HRV) and Functional Recovery in Players at the Samarra Basketball Club

Abstract

The present study aims to investigate the relationship between sleep quality, heart rate variability (HRV) and functional recovery among players of the Samarra Basketball Club. The researcher employed a descriptive approach using correlational methods, as this was deemed appropriate for the nature of the research problem and its objectives. The study population comprised the players of the Samarra Basketball Club for the 2025–2026 season, totalling 14 players representing the club’s advanced team, All were selected as the research sample using a comprehensive enumeration method, representing 100% of the original population. The Pittsburgh Sleep Quality Index (PSQI) was used to measure the players’ sleep quality, alongside heart rate variability (HRV) measurements using the RMSSD and SDNN indices, In addition, the Functional Recovery Scale (TQR) was used to determine the players’ level of recovery following training loads. The researcher also utilised a number of tools and devices, including a heart rate monitor, HRV measurement applications, data recording forms, and SPSS for data processing and statistical analysis. The main conclusions were that sleep quality and HRV are important indicators in assessing the functional and recovery status of basketball players, and that improving sleep quality and increasing HRV values contribute to improved recovery processes and physical readiness, as well as reducing instances of fatigue and sports-related stress.