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

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Abstract

Four groups of male subjects participated in anaerobic testing on a Repco EX 10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg‐1 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°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 bicarbonate 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.
Original languageEnglish
Pages (from-to)425-435
JournalJournal of Sports Sciences
Volume10
Issue number5
DOIs
Publication statusPublished - 1992

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Sodium Bicarbonate
Bicarbonates
Eating
Placebos
Lactic Acid

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title = "Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations",
abstract = "Four groups of male subjects participated in anaerobic testing on a Repco EX 10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg‐1 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°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 bicarbonate 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.",
author = "McNaughton, {Lars R}",
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language = "English",
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journal = "Journal of Sports Sciences",
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Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations. / McNaughton, Lars R.

In: Journal of Sports Sciences, Vol. 10, No. 5, 1992, p. 425-435.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations

AU - McNaughton, Lars R

PY - 1992

Y1 - 1992

N2 - Four groups of male subjects participated in anaerobic testing on a Repco EX 10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg‐1 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°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 bicarbonate 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.

AB - Four groups of male subjects participated in anaerobic testing on a Repco EX 10 cycle ergometer to determine the effectiveness of sodium bicarbonate (0.3 g kg‐1 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°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 bicarbonate 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.

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