Ramadan Observance Is Associated with Impaired Kung-Fu-Specific Decision-Making Skills

Anis Saddoud, Aïmen Khacharem, Cyrine H'Mida, Khaled Trabelsi, Omar Boukhris, Achraf Ammar, Cain C T Clark, Jordan M Glenn, Hamdi Chtourou, Mohamed Jarraya, Thomas Rosemann, University Zuric

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)
    30 Downloads (Pure)


    The aim of the present study is to evaluate the effect of Ramadan observance (RAM) on decision-making in Kung-Fu athletes. Fourteen male Kung-Fu athletes (mean age = 19 ± 3 years) completed two test sessions: before Ramadan (BR) and at the end of Ramadan (ER). In the afternoon of each session (between 16:00 h and 18:00 h), participants completed: Epworth Sleepiness Scale (ESS), Profile of Mood States (POMS), and Pittsburg Sleep Quality Index (PSQI). Subjects also reported subjective fatigue, alertness, and concentration. Additionally, all participants performed video-based decision-making tasks (i.e., reaction time and decision-making). Results indicated that reaction time decreased by 30% at ER vs. BR (p < 0.01). However, decision-making decreased by 9.5% at ER vs. BR (p < 0.05). PSQI results indicated sleep quality score, sleep duration, and sleep efficiency were negatively affected at ER compared to BR (p < 0.05). ESS was higher at ER compared to BR (p < 0.05). In addition, fatigue scores, estimated by the POMS and current subjective feelings (i.e., fatigue, concentration, and alertness), were also negatively affected at ER compared to BR (p < 0.05). In conclusion, Ramadan observance was associated with an adverse effect on sleep and decision making, as well as feelings of fatigue, alertness, and concentration.

    Original languageEnglish
    Article number7340
    Number of pages10
    JournalInternational Journal of Environmental Research and Public Health
    Issue number14
    Publication statusPublished - 9 Jul 2021

    Bibliographical note

    This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


    • intermittent fasting
    • decision making
    • sleep
    • sleepiness
    • fatigue
    • athletes


    Dive into the research topics of 'Ramadan Observance Is Associated with Impaired Kung-Fu-Specific Decision-Making Skills'. Together they form a unique fingerprint.

    Cite this