Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations

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Deutscher übersetzter Titel:Natriumbikarbonateinnahme und ihre Auswirkung auf anaerobe koerperliche Belastung von unterschiedlicher Dauer
Autor:MacNaughton, Lars R.
Erschienen in:Journal of sports sciences
Veröffentlicht:10 (1992), 5, S. 425-435, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0264-0414, 1466-447X
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Erfassungsnummer:PU199210059987
Quelle:BISp

Abstract

Four groups of male subjects participated in anaerobic testing on a Repco EX10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg body mass) as an ergogenic aid during exercise of 10, 30, 120 and 240 s duration. Blood was collected 90 min prior to ingestion of sodium bicarbonate (NaHCO3), after ingestion of NaHCO3 and immediately post-exercise from a heated (43-46 deg C) fingertip and analysed immediately post-collection for pH, base excess, bicarbonate and lactate. The total work undertaken (kJ) and peak power achieved during the tests were also obtained via a Repco Work Monitor Unit. Blood bicarbonate levels were again increased above the control and placebo conditions (P<0.001) and blood lactate levels were also increased following the bicarbonbate trials. The pH levels fell significantly (P<0.05) below the control and placebo conditions in all trials. The results indicate that NAHCO3 at this dosage has no ergogenic benefit for work of either 10 or 30 s duration, even though blood bicarbonate levels were significantly increased (P<0.05) following ingestion of NaHCO3. For work periods of 120 and 240 s, performance was significantly increased (P<0.05) above the control and placebo conditions following NaHCO3 ingestion. Verf.-Referat