ArticleBMC sports science, medicine & rehabilitation2025
Difference in subjective sleep quality and related lifestyle habits of student-athletes according to chronotype: a cross-sectional study.
Article in BMC sports science, medicine & rehabilitation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Late Bedtime and Poor Sleep Quality Among University Esports Players: A Cross-Sectional Study.Healthcare (Basel, Switzerland) · 2026Article
- Bedtime procrastination as the missing link between chronotype and insomnia.Scientific reports · 2026Article
- Association between problematic smartphone use, sleep quality, and chronotype among Sudanese medical students during armed conflict: a cross-sectional study.Frontiers in public health · 2026Article
- The interplay of physical activity, sleep, and chronotype on physical and mental health in Italian university students: a moderated mediation analysis.BMC public health · 2025Article
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8 authors.
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Abstract
backgroundSleep plays a vital role in the recovery of athletes, yet many student-athletes struggle with poor sleep quality. The literature has reported that chronotypes, which reflect different circadian phases, are related to poor sleep quality and lifestyle habits. However, there is a lack of findings specific to student-athletes. This study aimed to investigate differences in subjective sleep quality and related lifestyle habits among student-athletes based on their chronotype.
methodsStudent-athletes were defined as university athletic club members. A cross-sectional web-based survey collected data from 665 student-athletes at three Japanese universities (male: 70.7%; mean age: 19.7 ± 0.8 years). Chronotypes were assessed using the Morningness-Eveningness Questionnaire, while subjective sleep quality was measured using the Pittsburgh Sleep Quality Index. Lifestyle habits included skipping breakfast, taking caffeinated drinks, using a smartphone/cellphone after lights out, and morning practice. Subjective sleep quality and these lifestyle habits were compared among chronotypes using one-way analysis of covariance (ANCOVA), along with binomial and ordinal logistic regression analyses, adjusted for sex and age.
resultsThe chronotype distribution was 15.9% eveningness, 72.9% intermediate, and 11.1% morningness. Individuals with later chronotypes had a higher prevalence of poor sleep quality. Additionally, a higher percentage of those with later chronotypes skipped breakfast and used a smartphone/cellphone after lights out. A lower percentage of later chronotypes also participated in morning practice ≥ 4 days/week. However, morning practice ≥ 4 days/week was associated with poor subjective sleep quality only among student-athletes with an evening chronotype, not among those with intermediate or morning chronotype.
conclusionAddressing poor lifestyle habits and promoting earlier chronotypes may be crucial for improving subjective sleep quality in student-athletes with an evening chronotype.
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