58960
document
Effect of beta-alanine , with and without sodium bicarbonate , on 2000-m rowing performance . PURPOSE To examine the effect of beta-alanine only and beta-alanine with sodium bicarbonate supplementation on 2,000-m rowing performance . METHODS Twenty well-trained rowers ( age 23 ± 4 y ; height 1.85 ± 0.08 m ; body mass 82.5 ± 8.9 kg ) were assigned to either a placebo or beta-alanine ( 6.4 g · d ( -1 ) for 4 weeks ) group . A 2,000-m rowing time trial ( TT ) was performed before supplementation ( Baseline ) and after 28 and 30 days of supplementation . The post supplementation trials involved supplementation with either maltodextrin or sodium bicarbonate in a double-blind , crossover design , creating four study conditions ( placebo with maltodextrin ; placebo with sodium bicarbonate ; beta-alanine with maltodextrin ; beta-alanine with sodium bicarbonate ) . Blood lactate , pH , bicarbonate , and base excess were measured pre-TT , immediately post-TT and at TT+5 min . Performance data were analyzed using magnitude based inferences . RESULTS Beta-alanine supplementation was very likely to be beneficial to 2,000-m rowing performance ( 6.4 ± 8.1 s effect compared with placebo ) , with the effect of sodium bicarbonate having a likely benefit ( 3.2 ± 8.8 s ) . There was a small ( 1.1 ± 5.6 s ) but possibly beneficial additional effect when combining chronic beta-alanine supplementation with acute sodium bicarbonate supplementation compared with chronic beta-alanine supplementation alone . Sodium bicarbonate ingestion led to increases in plasma pH , base excess , bicarbonate , and lactate concentrations . CONCLUSIONS Both chronic beta-alanine and acute sodium bicarbonate supplementation alone had positive effects on 2,000-m rowing performance . The addition of acute sodium bicarbonate to chronic beta-alanine supplementation may further enhance rowing performance .
58961
Intervention_Pharmacological
beta-alanine
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Intervention_Pharmacological
sodium bicarbonate
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Intervention_Pharmacological
beta-alanine with sodium bicarbonate supplementation
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Outcome_Physical
rowing performance
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Outcome_Physical
2,000-m rowing performance .
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Outcome_Physical
A 2,000-m rowing time trial ( TT )
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Outcome_Physical
Blood lactate , pH , bicarbonate , and base excess
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Outcome_Physical
Performance
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Outcome_Physical
beneficial to 2,000-m rowing performance
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Outcome_Physical
increases in plasma pH , base excess , bicarbonate , and lactate concentrations
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Outcome_Physical
2,000-m rowing performance
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Outcome_Physical
enhance rowing performance