Effect of induced alkalosis on swimming time trials

Pierce, Edgar F.; Eastman, Norris W.; Hammer, Warren H.; Lynn, Tracey D.

doi:10.1080/02640419208729924

Cited by 26 publications

(19 citation statements)

References 7 publications

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“…These Wndings provide new information about the ergogenic eVects of NaHCO 3 and demonstrate that NaHCO 3 provides no beneWt to short-duration high-intensity swim performance in highly trained swimmers regardless of the loading protocol. Previous studies (Gao et al 1988;Mero et al 2004;Pierce et al 1992) have also failed to demonstrate improvements in swimming performance after acute loading of NaHCO 3 . However, these studies administered smaller doses, interval-swimming protocols and/or shorter swimming distances (e.g., 100 yd; 91.4 m).…”

Section: Discussionmentioning

confidence: 93%

Acute and chronic loading of sodium bicarbonate in highly trained swimmers

et al. 2011

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In the present study, 200-m swim time in highly trained male swimmers was measured on two consecutive days (Trial 1 and Trial 2) and under three conditions [(1) acute loading, AcL; (2) chronic loading, ChL; (3) Placebo, PLA]. No sodium bicarbonate (NaHCO(3)) was administered between Trial 1 and Trial 2 under each condition. Blood lactate concentration ([La(-)]), base excess of extracellular fluid (BE(ecf)), plasma bicarbonate concentration ([HCO(3) (-)]) and pH were determined before and after capsule administration as well as at 0, 3, 5, 15 and 30 min after each 200-m swim trial. Swim time was not different among AcL, ChL or PLA for Trial 1 or 2 and we observed no change in 200-m swim time from Trial 1 to 2 under any condition (F = 0.48, P = 0.80). [HCO(3) (-)], pH and BE(ecf) measured after capsule administration was higher during AcL and ChL when compared with PLA (P < 0.05). We did not observe any difference in blood [La(-)] between the three conditions at any stage post-exercise (P > 0.05). The results indicate that acute and chronic loading of NaHCO(3) does not improve 200-m swim time in highly trained male swimmers.

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Section: Discussionmentioning

confidence: 93%

Acute and chronic loading of sodium bicarbonate in highly trained swimmers

et al. 2011

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“…Subsequent investigations largely, though not always, confirmed these early findings in various repeated swim models (Mero et al;2004;Pruscino et al, 2008;Siegler & Gleadall-Siddall, 2010;Zajac et al, 2009), though Zajac et al (2009) found significant performance improvement only in the first of four 50-m swims. Pierce et al (1992) looked at the effects of supplementation in simulated swim competitions involving one 91.4-m swim followed by two 182.8-m swims with a 20-min recovery between each and found no effect on performance. An increased speed in the later swims of a set of intervals may be seen as providing a greater stimulus to training adaptation, but blunting of the metabolic acidosis may reduce the adaptation.…”

Section: Bicarbonate and Beta-alaninementioning

confidence: 99%

Dietary Supplements for Aquatic Sports

Derave¹,

Tipton²

2014

International Journal of Sport Nutrition and Exercise Metabolism

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Many athletes use dietary supplements, with use more prevalent among those competing at the highest level. Supplements are often self-prescribed, and their use is likely to be based on an inadequate understanding of the issues at stake. Supplementation with essential micronutrients may be useful when a diagnosed deficiency cannot be promptly and effectively corrected with food-based dietary solutions. When used in high doses, some supplements may do more harm than good: Iron supplementation, for example, is potentially harmful. There is good evidence from laboratory studies and some evidence from field studies to support health or performance benefits from appropriate use of a few supplements. The available evidence from studies of aquatic sports is small and is often contradictory. Evidence from elite performers is almost entirely absent, but some athletes may benefit from informed use of creatine, caffeine, and buffering agents. Poor quality assurance in some parts of the dietary supplements industry raises concerns about the safety of some products. Some do not contain the active ingredients listed on the label, and some contain toxic substances, including prescription drugs, that can cause health problems. Some supplements contain compounds that will cause an athlete to fail a doping test. Supplement quality assurance programs can reduce, but not entirely eliminate, this risk.

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“…Some studies have examined the ergogenic potential of SB on short-distance swimming performance (i.e., 100 and 200 m or 100 and 200 yards) and interval swimming performance (Gao et al 1988;Pierce et al 1992;Lindh et al 2008;Pruscino et al 2008;Siegler and Hirscher 2010;Joyce et al 2012). However, results are quite conflicting; some studies reported no effect of SB on timetrial performance (Pierce et al 1992;Pruscino et al 2008;Joyce et al 2012), one reported a positive effect on swimming trials (Lindh et al 2008), and others reported improved interval swimming performance (Gao et al 1988;Siegler and Hirscher 2010).…”

Section: Introductionmentioning

confidence: 99%

“…However, results are quite conflicting; some studies reported no effect of SB on timetrial performance (Pierce et al 1992;Pruscino et al 2008;Joyce et al 2012), one reported a positive effect on swimming trials (Lindh et al 2008), and others reported improved interval swimming performance (Gao et al 1988;Siegler and Hirscher 2010). However, no study has yet investigated the effects of BA supplementation on swimming performance.…”

Section: Introductionmentioning

confidence: 99%

The ergogenic effect of beta-alanine combined with sodium bicarbonate on high-intensity swimming performance

Painelli

Roschel

Jesus

et al. 2013

Appl. Physiol. Nutr. Metab.

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We investigated the effect of beta-alanine (BA) alone (study A) and in combination with sodium bicarbonate (SB) (study B) on 100- and 200-m swimming performance. In study A, 16 swimmers were assigned to receive either BA (3.2 g·day−1 for 1 week and 6.4 g·day−1 for 4 weeks) or placebo (PL; dextrose). At baseline and after 5 weeks of supplementation, 100- and 200-m races were completed. In study B, 14 were assigned to receive either BA (3.2 g·day−1 for 1 week and 6.4 g·day−1 for 3 weeks) or PL. Time trials were performed once before and twice after supplementation (with PL and SB), in a crossover fashion, providing 4 conditions: PL-PL, PL-SB, BA-PL, and BA-SB. In study A, BA supplementation improved 100- and 200-m time-trial performance by 2.1% (p = 0.029) and 2.0% (p = 0.0008), respectively. In study B, 200-m time-trial performance improved in all conditions, compared with presupplementation, except the PL-PL condition (PL-SB, +2.3%; BA-PL, +1.5%; BA-SB, +2.13% (p < 0.05)). BA-SB was not different from BA-PL (p = 0.21), but the probability of a positive effect was 78.5%. In the 100-m time-trial, only a within-group effect for SB was observed in the PL-SB (p = 0.022) and BA-SB (p = 0.051) conditions. However, 6 of 7 athletes swam faster after BA supplementation. The probability of BA having a positive effect was 65.2%; when SB was added to BA, the probability was 71.8%. BA and SB supplementation improved 100- and 200-m swimming performance. The coingestion of BA and SB induced a further nonsignificant improvement in performance.

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Effect of induced alkalosis on swimming time trials

Cited by 26 publications

References 7 publications

Acute and chronic loading of sodium bicarbonate in highly trained swimmers

Acute and chronic loading of sodium bicarbonate in highly trained swimmers

Dietary Supplements for Aquatic Sports

The ergogenic effect of beta-alanine combined with sodium bicarbonate on high-intensity swimming performance

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