| Title |
The Reproducibility of 4-km Time Trial (TT) Performance Following Individualised Sodium Bicarbonate Supplementation: a Randomised Controlled Trial in Trained Cyclists
|
|---|---|
| Published in |
Sports Medicine - Open, September 2017
|
| DOI | 10.1186/s40798-017-0101-4 |
| Pubmed ID | |
| Authors |
Lewis Anthony Gough, Sanjoy Kumar Deb, Andy Sparks, Lars Robert McNaughton |
| Abstract |
Individual time to peak blood bicarbonate (HCO3(-)) has demonstrated good to excellent reproducibility following ingestion of both 0.2 g kg(-1) body mass (BM) and 0.3 g kg(-1) BM sodium bicarbonate (NaHCO3), but the consistency of the time trial (TT) performance response using such an individualised NaHCO3 ingestion strategy remains unknown. This study therefore evaluated the reproducibility of 4-km TT performance following NaHCO3 ingestion individualised to time to peak blood bicarbonate. Eleven trained male cyclists completed five randomised treatments with prior ingestion of 0.2 g kg(-1) (SBC2) or 0.3 g kg(-1) BM (SBC3) NaHCO3, on two separate occasions each, or a control trial entailing no supplementation. Participants completed a 4-km cycling TT on a Velotron ergometer where time to complete, power and speed were measured, whilst acid-base blood parameters were also recorded (pH and blood bicarbonate concentration HCO3(-)) and lactate [La(-)]. Alkalosis was achieved prior to exercise in both SBC2 and SBC3, as pH and HCO3(-) were greater compared to baseline (p < 0.001), with no differences between treatments (p > 0.05). The reproducibility of the mean absolute change from baseline to peak in HCO3(-) was good in SBC2 (r = 0.68) and excellent in SBC3 (r = 0.78). The performance responses following both SBC2 and SBC3 displayed excellent reproducibility (r range = 0.97 to 0.99). Results demonstrate excellent reproducibility of exercise performance following individualised NaHCO3 ingestion, which is due to the high reproducibility of blood acid-base variables with repeat administration of NaHCO3. Using a time to peak HCO3(-) strategy seems to cause no dose-dependent effects on performance for exercise of this duration and intensity; therefore, athletes may consider smaller doses of NaHCO3 to mitigate gastrointestinal (GI) discomfort. |
X Demographics
The data shown below were collected from the profiles of 15 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 8 | 53% |
| United States | 1 | 7% |
| Brazil | 1 | 7% |
| Canada | 1 | 7% |
| Unknown | 4 | 27% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 8 | 53% |
| Scientists | 6 | 40% |
| Practitioners (doctors, other healthcare professionals) | 1 | 7% |
Mendeley readers
The data shown below were compiled from readership statistics for 65 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 65 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 13 | 20% |
| Student > Bachelor | 9 | 14% |
| Student > Ph. D. Student | 8 | 12% |
| Student > Doctoral Student | 3 | 5% |
| Professor | 3 | 5% |
| Other | 11 | 17% |
| Unknown | 18 | 28% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 27 | 42% |
| Nursing and Health Professions | 4 | 6% |
| Biochemistry, Genetics and Molecular Biology | 3 | 5% |
| Agricultural and Biological Sciences | 3 | 5% |
| Arts and Humanities | 3 | 5% |
| Other | 6 | 9% |
| Unknown | 19 | 29% |
Attention Score in Context
This research output has an Altmetric Attention Score of 11. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 26 February 2021.
All research outputs
#2,776,736
of 23,003,906 outputs
Outputs from Sports Medicine - Open
#206
of 477 outputs
Outputs of similar age
#53,764
of 318,503 outputs
Outputs of similar age from Sports Medicine - Open
#4
of 12 outputs
Altmetric has tracked 23,003,906 research outputs across all sources so far. Compared to these this one has done well and is in the 87th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 477 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 25.1. This one has gotten more attention than average, scoring higher than 56% of its peers.
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We're also able to compare this research output to 12 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 66% of its contemporaries.