Ramadan intermittent fasting alters cardiac autonomic modulation, neuromuscular performance, and recovery in adolescent tennis players: a within-subject repeated-measures design

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dc.contributor.authorLakhdar, Nadia
dc.contributor.authorLandolsi, Mounir
dc.contributor.authorGhouili, Hatem
dc.contributor.authorCeylan, Halil Ibrahim
dc.contributor.authorCeylan, Nagihan Burcak
dc.contributor.authorMuntean, Raul Ioan
dc.contributor.authorDergaa, Ismail
dc.date.accessioned2026-09-01T15:52:37Z
dc.date.available2026-09-01T15:52:37Z
dc.date.issued2026
dc.departmentBayburt Üniversitesi
dc.description.abstractBackground: Tennis requires repeated high-intensity efforts with brief recovery periods, placing significant demands on cardiac autonomic regulation and neuromuscular performance. Ramadan intermittent fasting alters sleep, nutrition, and hydration patterns, potentially affecting match responses, particularly in adolescents. Methods: Sixteen male International Tennis Federation (ITF) junior players completed a within-subject repeated-measures study during mid-Ramadan and 15 days post-Ramadan. Each performed a standardized two-set outdoor match under both conditions. Heart rate variability (HRV), countermovement jump (CMJ), blood glucose, hydration markers, and rating of perceived exertion were assessed at baseline (T0), between sets (T1), and post-match (T2). Sleepiness, chronotype, fatigue, and recovery were evaluated via validated questionnaires. Results: Match play reduced lnRMSSD (p < 0.001, eta p(2 )= 0.775) and increased LF/HF (p < 0.001, eta p(2)= 0.234), indicating sympathetic dominance. During Ramadan, parasympathetic activity was lower (p < 0.001, eta p(2)= 0.269), and CMJ performance was reduced (p = 0.010, eta p(2)= 0.085). Blood glucose showed a Period & times; Set interaction (p = 0.020,eta p(2) = 0.114). Sleepiness, fatigue, and perceived recovery were significantly impaired (p < 0.001). Conclusion: Ramadan intermittent fasting reduces vagal activity and impairs neuromuscular performance in adolescent tennis players. HRV-guided training, optimized nutrition, and sleep management may help mitigate these effects.
dc.description.sponsorshipOngoing Research Funding program [ORF-2026-262]; King Saud University, Riyadh, Saudi Arabia -- Ongoing Research Funding program (ORF-2026-262), King Saud University, Riyadh, Saudi Arabia.
dc.identifier.doi10.1080/09291016.2026.2680178
dc.identifier.issn0929-1016
dc.identifier.issn1744-4179
dc.identifier.orcid0000-0003-4615-6687
dc.identifier.scopus2-s2.0-105041055002
dc.identifier.scopusqualityQ2
dc.identifier.urihttp://dx.doi.org/10.1080/09291016.2026.2680178
dc.identifier.urihttps://hdl.handle.net/20.500.12403/8509
dc.identifier.wosWOS:001779823900001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofBiological Rhythm Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260820
dc.subjectCardiac Hrv
dc.subjectChronotype
dc.subjectIntermittent Sport
dc.subjectPerceived Exertion
dc.subjectSleep Quality
dc.subjectWellness Monitoring
dc.titleRamadan intermittent fasting alters cardiac autonomic modulation, neuromuscular performance, and recovery in adolescent tennis players: a within-subject repeated-measures design
dc.typeArticle

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