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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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EFFECTS OF SODIUM BICARBONATE INGESTION ON SWIM PERFORMANCE IN YOUTH ATHLETES |
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Adam Zajac1  ,
Jaroslaw Cholewa1, Stanislaw Poprzecki2, Zbigniew
Waskiewicz3 and Jozef Langfort2,4 |
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1Department of Sports Training, Academy of Physical Education in Katowice, Poland 2Department of Biochemistry, Academy of Physical Education in Katowice, Poland 3Department of Team Sports, Academy of Physical Education in Katowice, Poland 4Department of Experimental Pharmacology, Medical Research Center, Polish Academy of Sciences, Warsaw, Poland |
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© Journal of Sports Science and Medicine (2009) 8, 45 - 50 Search Google Scholar for Citing Articles |
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| ABSTRACT | |||
| The purpose of this study was to evaluate the effect of oral administration
of sodium bicarbonate (300 mg·kg-1 b.w.) on swim performance in competitive,
(training experience of 6.6 ± 0.6 years) youth, (15.1 ± 0.6 years) male
swimmers. The subjects completed a test trial, in a double blind fashion,
on separate days, consisting of 4 x 50m front crawl swims with a 1st minute
passive rest interval twice, on two occasions: after ingestion of bicarbonate
or placebo, 72 hours apart, at the same time of the day. Blood samples were
drawn from the finger tip three times during each trial; upon arrival to
the laboratory, 60 min after ingestion of placebo or the sodium bicarbonate
solution and after the 4 x 50m test, during the 1st min of recovery. Plasma
lactate concentration, blood pH, standard bicarbonate and base excess were
evaluated. The total time of the 4 x 50 m test trial improved from 1.54.28
to 1.52.85s, while statistically significant changes in swimming speed were
recorded only during the first 50m sprint (1.92 vs. 1.97 m·s-1, p < 0.05).
Resting blood concentration of HCO-3 increased following the ingestion of
sodium bicarbonate from 25.13 to 28.49 mM (p < 0.05). Sodium bicarbonate
intake had a statistically significant effect on resting blood pH (7.33
vs. 7.41, p < .05) as well as on post exercise plasma lactate concentration
(11.27 vs. 13.06 mM, p < 0.05)). Collectively, these data demonstrate
that the ingestion of sodium bicarbonate in youth athletes is an effective
buffer during high intensity interval swimming and suggest that such a procedure
can be used in youth athletes to increase training intensity as well as
swimming performance in competition at distances from 50 to 200 m.
Key words: Sodium bicarbonate, swimming, youth athletes, buffering capacity. |
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