{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T03:42:03Z","timestamp":1788579723538,"version":"build-2803163510"},"reference-count":27,"publisher":"Human Kinetics","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,11,1]]},"abstract":"<jats:p>The present study investigated individualized sodium bicarbonate (NaHCO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup>) supplementation in elite orienteers and its effects on alkalosis and performance in a simulated sprint orienteering competition. Twenty-one Danish male and female elite orienteers (age\u2009=\u200925.2\u2009\u00b1\u20093.6 years, height\u2009=\u2009176.4\u2009\u00b1\u200910.9\u00a0cm, body mass\u2009=\u200966.6\u2009\u00b1\u20097.9\u00a0kg) were tested twice in order to identify individual time to peak blood bicarbonate (HCO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup> peak) following supplementation of 0.3\u00a0g\/kg body mass NaHCO<jats:sub>3<\/jats:sub> with and without warm-up. The athletes also performed two 3.5 km time-trial runs (TT-runs) following individualized timing of NaHCO<jats:sub>3<\/jats:sub> supplementation (SBS) or placebo (PLA) on separate days in a randomized, double-blind, cross-over design. The occurrence of individual peak HCO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup> and pH ranged from 60 to 180\u00a0min. Mean HCO<jats:sub>3<\/jats:sub><jats:sup>\u2212<\/jats:sup> and pH in SBS were significantly higher compared with PLA 10\u00a0min before and following the TT-run (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.01). SBS improved overall performance in the 3.5 km TT-run by 6\u00a0s compared with PLA (775.5\u2009\u00b1\u200916.2\u00a0s vs. 781.4\u2009\u00b1\u200916.1\u00a0s, respectively; <jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05). SBS improved performance in the last half of the TT-run compared with PLA (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.01). In conclusion, supplementation with NaHCO<jats:sub>3<\/jats:sub> followed by warm-up resulted in individualized alkalosis peaks ranging from 60 to 180\u00a0min. Individualized timing of SBS in elite orienteers induced significant alkalosis before and after a 3.5 km TT and improved overall performance time by 6\u00a0s, which occurred in the last half of the time trial. The present data show that the anaerobic buffer system is important for performance in these types of endurance events lasting 12\u201315\u00a0min.<\/jats:p>","DOI":"10.1123\/ijsnem.2020-0352","type":"journal-article","created":{"date-parts":[[2021,9,1]],"date-time":"2021-09-01T07:36:37Z","timestamp":1630481797000},"page":"453-459","source":"Crossref","is-referenced-by-count":10,"title":["Increased Performance in Elite Runners Following Individualized Timing of Sodium Bicarbonate Supplementation"],"prefix":"10.1123","volume":"31","author":[{"given":"Tue A.H.","family":"Lassen","sequence":"first","affiliation":[{"name":"Aarhus University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lars","family":"Lindstr\u00f8m","sequence":"additional","affiliation":[{"name":"Aarhus University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"L\u00f8nbro","sequence":"additional","affiliation":[{"name":"Aarhus University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Klavs","family":"Madsen","sequence":"additional","affiliation":[{"name":"Norwegian School of Sport Sciences"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"6","key":"r1","series-title":"International Journal of Sport Nutrition and Exercise Metabolism,","doi-asserted-by":"publisher","first-page":"632","DOI":"10.1123\/ijsnem.2013-0168","article-title":"Effect of carbohydrate or sodium bicarbonate ingestion on performance during a validated basketball simulation test","volume":"24","author":"Afman, G.","year":"2014","unstructured":"Afman, G., Garside, R.M., Dinan, N., Gant, N., Betts, J.A., & Williams, C. 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