Research Article

Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study

Number: 30 August 31, 2026
TR EN

Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study

Abstract

Aim: Sleep quality is vital for recovery and performance in elite sports. This study investigated the associations between body composition, diet quality, and sleep quality in professional athletes within the context of biological rhythms.

Method: In this cross-sectional study of 89 professional athletes (football, volleyball, basketball), body composition was determined via the Jackson-Pollock 7-site skinfold method. Diet quality and sleep quality were assessed using the Healthy Eating Index-2015 (HEI-2015) and Pittsburgh Sleep Quality Index (PSQI), respectively.

Results: Most athletes (83.2%) had moderate diet quality and 94.4% reported good sleep quality. No significant association was found between overall diet quality and sleep quality (p=0.723). However, athletes with poor sleep quality had significantly higher body fat percentages (p=0.003). Diet quality significantly differed by training duration (p<0.05) and nutrition knowledge (p=0.034). Sleep quality was significantly associated with smoking and sleep-support supplement use (p<0.05). A weak but significant positive correlation existed between PSQI scores and body fat percentage (r=0.293, p<0.05).

Conclusion: Overall diet quality was not directly associated with sleep quality among professional athletes. However, sleep quality was significantly related to body fat percentage as well as several training and lifestyle characteristics. These findings highlight the importance of addressing sleep quality and body composition together when developing nutrition and lifestyle strategies aimed at improving recovery and performance in elite athletes.

Keywords

Supporting Institution

This research did not receive any specific grant from funding agencies in the public, commercial, or non-profit sectors.

Ethical Statement

Ethical approval for the study was obtained from the Izmir Tinaztepe University Clinical Research Ethics Committee (16/11/2023–2023/30). Written informed consent was obtained from all participants prior to data collection.

Thanks

This study is derived from the master’s thesis of GSP, conducted under the supervision of MY at Izmir Tinaztepe University in Turkey. The authors would like to express their gratitude to the athletes and coaching staff who participated in this study for their time and cooperation.

References

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Details

Primary Language

English

Subjects

Sport and Exercise Nutrition

Journal Section

Research Article

Early Pub Date

August 31, 2026

Publication Date

August 31, 2026

Submission Date

May 21, 2026

Acceptance Date

August 12, 2026

Published in Issue

Year 2026 Number: 30

APA
Şen Polat, G., & Yılmaz, M. (2026). Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study. Istanbul Gelisim University Journal of Health Sciences, 30, 695-710. https://doi.org/10.38079/igusabder.1956723
AMA
1.Şen Polat G, Yılmaz M. Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study. IGUSABDER. 2026;(30):695-710. doi:10.38079/igusabder.1956723
Chicago
Şen Polat, Göksu, and Merve Yılmaz. 2026. “Associations of Diet Quality and Body Composition With Sleep Quality in Professional Athletes: A Cross-Sectional Study”. Istanbul Gelisim University Journal of Health Sciences, nos. 30: 695-710. https://doi.org/10.38079/igusabder.1956723.
EndNote
Şen Polat G, Yılmaz M (August 1, 2026) Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study. Istanbul Gelisim University Journal of Health Sciences 30 695–710.
IEEE
[1]G. Şen Polat and M. Yılmaz, “Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study”, IGUSABDER, no. 30, pp. 695–710, Aug. 2026, doi: 10.38079/igusabder.1956723.
ISNAD
Şen Polat, Göksu - Yılmaz, Merve. “Associations of Diet Quality and Body Composition With Sleep Quality in Professional Athletes: A Cross-Sectional Study”. Istanbul Gelisim University Journal of Health Sciences. 30 (August 1, 2026): 695-710. https://doi.org/10.38079/igusabder.1956723.
JAMA
1.Şen Polat G, Yılmaz M. Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study. IGUSABDER. 2026;:695–710.
MLA
Şen Polat, Göksu, and Merve Yılmaz. “Associations of Diet Quality and Body Composition With Sleep Quality in Professional Athletes: A Cross-Sectional Study”. Istanbul Gelisim University Journal of Health Sciences, no. 30, Aug. 2026, pp. 695-10, doi:10.38079/igusabder.1956723.
Vancouver
1.Göksu Şen Polat, Merve Yılmaz. Associations of Diet Quality and Body Composition with Sleep Quality in Professional Athletes: A Cross-Sectional Study. IGUSABDER. 2026 Aug. 1;(30):695-710. doi:10.38079/igusabder.1956723

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