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The effects of NaHCO3 and NaCl loading on hematocrit and high-intensity cycling performance
Citation
Driller, M and Williams, A and Bellinger, P and Howe, S and Fell, J, The effects of NaHCO3 and NaCl loading on hematocrit and high-intensity cycling performance, Journal of Exercise Physiology, 15, (1) pp. 47-56. ISSN 1097-9751 (2012) [Refereed Article]
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Copyright Statement
Copyright 2012 American Society of Exercise Physiologists
Official URL: http://faculty.css.edu/tboone2/asep/JEPonlineFebru...
Abstract
Inconsistent findings
regarding the benefits of sodium bicarbonate (NaHCO3) loading on
exercise performance may be related to the use of sodium chloride
(NaCl) as placebo substances. It has been postulated that the sodium
content of both substances may contribute to performance benefits.
The purpose of this study was to compare NaHCO3 and NaCl to a
physically inert placebo by evaluating the effect of acute loading on
high-intensity cycling performance. Eight well-trained cyclists (age =
24 ± 7 yrs; mass = 77 ± 9 kg; VO2 peak = 59.8 ± 8.6 mL•kg-1•min-1)
completed a 2-min performance test on a cycling ergometer after
either NaHCO3 loading (SB), NaCl loading (SC), or placebo loading
(D) in a randomized, double-blind design. Blood samples were taken
pre- and post-loading and pre- and post-performance test to analyze
hematocrit levels. The SB trial produced significantly higher (P < 0.05)
mean power (watts) in the 2-min test (514.9 ± 49.7) when compared
to the SC and D trials (504.3 ± 51.0 and 498.7 ± 50.6, respectively),
with no significant difference between SC and D trials (P > 0.05).
There were no significant differences in hematocrit levels at any timepoint
between the 3 trials (P > 0.05). These findings indicate that
NaHCO3 loading produced significant performance enhancement
when compared to both NaCl and a placebo substance.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | cycling, supplementation, performance |
| Research Division: | Medical and Health Sciences |
| Research Group: | Human Movement and Sports Science |
| Research Field: | Exercise Physiology |
| Objective Division: | Health |
| Objective Group: | Other Health |
| Objective Field: | Health not elsewhere classified |
| UTAS Author: | Driller, M (Dr Matthew Driller) |
| UTAS Author: | Williams, A (Associate Professor Andrew Williams) |
| UTAS Author: | Bellinger, P (Mr Phillip Bellinger) |
| UTAS Author: | Howe, S (Mr Sam Howe) |
| UTAS Author: | Fell, J (Associate Professor James Fell) |
| ID Code: | 76113 |
| Year Published: | 2012 |
| Deposited By: | Research Division |
| Deposited On: | 2012-02-28 |
| Last Modified: | 2017-11-01 |
| Downloads: | 0 |
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