Varying Doses of Evening Caffeine Ingestion Have Different Effects on Rowing Ergometer Performance, Sleep Quality and Wakefulness Scores
Yazarlar (11)
Prof. Dr. İzzet Karakulak Mardin Artuklu Üniversitesi, Türkiye
Doç. Dr. Ulaş Can YILDIRIM Sinop Üniversitesi, Türkiye
Dilara Erkan
Türkiye
Türkiye
Dr. Öğr. Üyesi Raci Karayiğit Türkiye
Doç. Dr. Ender Eyuboğlu Bartın Üniversitesi, Türkiye
Arş. Gör. Mehmet Can GÜNDEM Sinop Üniversitesi, Türkiye
Doç. Dr. Damla Selin Yıldırım Türkiye
Dr. Öğr. Üyesi Halit ŞAR Sinop Üniversitesi, Türkiye
Doç. Dr. Gökmen Özen Türkiye
Prof. Dr. Fırat Akça Türkiye
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | FRONTIERS IN NUTRITION (Q1) | ||
| Dergi ISSN | 2296-861X Dergi Bilgileri (2025) | ||
| Dergi Tarandığı Indeksler | SCI-Expanded | ||
| Makale Dili | İngilizce | Basım Tarihi | 12-2025 |
| Kabul Tarihi | – | Yayınlanma Tarihi | 16-12-2025 |
| Cilt / Sayı / Sayfa | 12 / 0 / – | DOI | 10.3389/fnut.2025.1659220 |
| Makale Linki | https://public-pages-files-2025.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2025.1659220/pdf | ||
| UAK Araştırma Alanları |
Sporcu Beslenmesi
Ergojenik Yardım ve Doping
Egzersiz ve Spor Fizyolojisi
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| Özet |
| Introduction This study investigated the dose-dependent effects of evening caffeine ingestion on rowing performance, sleep quality, and daytime sleepiness in trained male rowers. Methods Using a double-blind, randomized, crossover design, 13 university-level rowers (mean age = 22.07 ± 2.21 years; mean body mass = 77.66 ± 6.45 kg) completed four 2,000 m time–trial sessions between 19:00 and 20:00 h under placebo (PLA), low-dose capsule caffeine (3 mg/kg, LDC), moderate-dose capsule caffeine (6 mg/kg, MDC), and high-dose capsule caffeine (9 mg/kg, HDC) conditions. Performance metrics, heart rate, and subjective sleep assessments were collected. Rowing performance was assessed by a standard 2,000 m rowing ergometer (Concept II, United States) time trial. Sleep quality was measured with a numerical rating scale in the morning after each trial, and daytime sleepiness was measured with the Karolinska Sleepiness Scale. Results Results indicated significantly improved rowing times and power output with HDC and MDC compared to PLA (p < 0.05), with HDC yielding the most notable enhancements (d = 0.40–0.41). However, these ergogenic benefits were accompanied by significantly impaired sleep quality and elevated daytime sleepiness in both HDC and MDC groups (p < 0.01; d = 1.3–1.5). Notably, adverse effects such as headache, insomnia, and gastrointestinal discomfort were predominantly reported in the HDC condition (p < 0.05). Although LDC offered mild performance improvements with minimal sleep disruption, only the high dose condition exhibited large physiological and perceptual trade-offs. Discussion … |
| Anahtar Kelimeler |
| caffeine | dose-response | rowing performance | sleep quality | wakefulness |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 1 |
| Google Scholar | 1 |