Objective To systematically review, summarise and appraise findings of published systematic reviews, with/without meta-analyses, examining associations between Ramadan fasting observance (RO), health-related indices and exercise test performances in athletes and physically active individuals.
Design Overview of systematic reviews with assessment of reviews’ methodological quality.
Data sources PubMed, Web of Science, Scopus, Cochrane Database of Systematic Reviews, SPORTDiscus, ProQuest, PsycINFO and SciELO.
Eligibility criteria for selecting studies Systematic reviews with/without meta-analyses examining associations of RO with health-related indices and exercise performances in athletes and physically active individuals.
Results Fourteen systematic reviews (seven with meta-analyses) of observational studies, with low-to-critically-low methodological quality, were included. Two reviews found associations between RO and decreased sleep duration in athletes and physically active individuals. One review suggested athletes may experience more pronounced reductions in sleep duration than physically active individuals. One review found associations between RO and impaired sleep quality in athletes and physically active individuals. RO was associated with decreased energy, carbohydrate and water intake in adult-aged athletes, but not adolescents. One review suggests RO was associated with athletes’ increased feelings of fatigue and decreased vigour. No association was found between RO and athletes’ lean mass or haematological indices. RO was unfavourably associated with changes in athletes’ performance during high-intensity exercise testing.
Conclusion Continuance of training during RO could be associated with athletes’ mood state disturbances, decreased sleep duration and performance decline during high-intensity exercise testing, while preserving lean mass. However, careful interpretation is necessary due to the low-to-critically-low methodological quality of the included reviews.
- Athletic Performance
- Exercise training
Data availability statement
Data sharing not applicable as no datasets generated and/or analysed for this study.
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Contributors TK, HJ, AA, OB, KC and HC conceived the idea for the review. TK, HJ, AA and OB conducted search, study selection, data extraction and quality assessment. TK, HJ, OB, AA, CC, MAB, JAW, JMG and KC drafted the initial manuscript. NLB, HC and MR contributed to writing the manuscript. All authors reviewed and approved the final manuscript. KT is the guarantor.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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