{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T15:38:40Z","timestamp":1792597120691,"version":"4.5.0"},"reference-count":75,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T00:00:00Z","timestamp":1792540800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T00:00:00Z","timestamp":1792540800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2026,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Beetroot juice (BJ) and caffeine (CAF) are well\u2010established ergogenic aids for exercise performance. However, little is known about their efficacy and interaction within the specific context of a judo competition day. This study investigated the acute effects of BJ, CAF, and their combination (BJCAF) on judo\u2010specific performance across a simulated competition day. Using a randomized, double\u2010blind, placebo\u2010controlled crossover design, 35 competitive judo athletes (age 23\u00a0\u00b1\u00a05\u00a0years; body mass 74\u00a0\u00b1\u00a013\u00a0kg) completed 4 sessions (BJ, CAF, BJCAF, and placebo), each consisting of 5 trials of judo randori and a Special Judo Fitness Test (SJFT), followed by neuromuscular and cognitive assessments. Compared with placebo, CAF enhanced SJFT performance, neuromuscular function, and cognition in trials 1\u20133 but not in trial 5 (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.05). Conversely, BJ improved these same metrics in trial 5 (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.05). BJCAF enhanced SJFT performance across trials 1\u20133 and 5, cognitive functions in trials 1, 2, and 4, and neuromuscular performance in all trials (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.05). Importantly, in trial 5, both BJ and BJCAF conditions yielded improved SJFT performance, neuromuscular function, and cognitive outcomes compared to CAF alone (\n                    <jats:italic>p<\/jats:italic>\n                    \u00a0&lt;\u00a00.05). The results demonstrate that the ergogenic effect of CAF was not maintained throughout the simulated competition day, whereas BJ provided late\u2010stage benefits. Co\u2010ingestion effectively counteracted the later\u2010session decline observed with CAF alone while maintaining its early advantages. This highlights the importance of considering temporal dynamics and metabolic costs when designing nutritional strategies for multi\u2010bout, high\u2010intensity sports tournaments such as judo.\n                  <\/jats:p>","DOI":"10.1002\/ejsc.70278","type":"journal-article","created":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T14:41:08Z","timestamp":1792593668000},"source":"Crossref","is-referenced-by-count":0,"title":["The Effect of Acute Beetroot Juice and Caffeine Supplementation on Specific Judo Performance During a Simulated Competition Day in Judo Athletes"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3553-0282","authenticated-orcid":false,"given":"Sefer","family":"Karaba\u011f","sequence":"first","affiliation":[{"name":"Sar\u0131kam\u0131\u015f Anatolian Imam Hatip High School Ministry of National Education  Sar\u0131kam\u0131\u015f Kars Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0088-303X","authenticated-orcid":false,"given":"Heidar","family":"Sajedi","sequence":"additional","affiliation":[{"name":"Department of Movement and Training Sciences Sport Science Faculty Duzce University  Duzce Turkey"},{"name":"Department of Exercise and Sports Science for Disabled People Faculty of Health Science International Science and Technology University  Warsaw Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-6154-5809","authenticated-orcid":false,"given":"Onur","family":"G\u00fcler","sequence":"additional","affiliation":[{"name":"Department of Sports Health Sciences Graduate School of Winter Sports and Sports Sciences Ataturk University  Erzurum Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8432-0105","authenticated-orcid":false,"given":"Vahdet","family":"Alaeddino\u011flu","sequence":"additional","affiliation":[{"name":"Department of Reaction Sciences Faculty of Sports Sciences Ataturk University  Erzurum Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5895-5297","authenticated-orcid":false,"given":"Erg\u00fcn","family":"\u00c7ak\u0131r","sequence":"additional","affiliation":[{"name":"Department of Coaching Education Faculty of Sports Sciences Van Yuzuncu Y\u0131l University  Van Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0546-6515","authenticated-orcid":false,"given":"Davar","family":"Khodadadi","sequence":"additional","affiliation":[{"name":"Faculty of Physical Education and Sports Sciences Islamic Azad University Central Tehran Branch  Tehran Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Selahattin","family":"Akp\u0131nar","sequence":"additional","affiliation":[{"name":"Department of Movement and Training Sciences Sport Science Faculty Duzce University  Duzce 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