Beta-alanine supplementation enhances judo-related performance in highly-trained athletes
(Beta-Alanin-Supplementierung verbessert bei hochqualifizierten Athleten die judospezifische Leistung )
Objectives: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals. Thus, glycolytic demand in judo is high and acidosis may limit performance. Carnosine is a relevant intracellular acid buffer whose content is increased with beta-alanine supplementation. Thus, we hypothesized that beta-alanine supplementation could attenuate acidosis and improve judo performance.
Design: Twenty-three highly-trained judo athletes were randomly assigned to receive either beta-alanine (6.4 g day-1) or placebo (dextrose, same dosage) for 4 weeks.
Methods: Performance was assessed before (PRE) and after (POST) supplementation through a 5-min simulated fight (randori) followed by 3 bouts of the Special Judo Fitness Test (SJFT). Blood samples were collected for blood pH, bicarbonate (HCO3-) and lactate determination.
Results: Beta-alanine supplementation improved the number of throws per set and the total number of throws (both p < 0.05). Placebo did not change these variables (both p > 0.05). Blood pH and HCO3- reduced after exercise (all p < 0.001), with no between-group differences (all p > 0.05). However, the lactate response to exercise increased in the beta-alanine group as compared to placebo (p < 0.05).
Conclusions: In conclusion, 4 weeks of beta-alanine supplementation effectively enhance judo-related performance in highly-trained athletes.
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Schlagworte: | Judo Leistung Hochleistungssport Supplementierung Test |
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Notationen: | Biowissenschaften und Sportmedizin Kampfsportarten |
DOI: | 10.1016/j.jsams.2016.08.014 |
Veröffentlicht in: | Journal of Science and Medicine in Sport |
Veröffentlicht: |
2017
|
Jahrgang: | 20 |
Heft: | 4 |
Seiten: | 403-408 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |