| Title |
Caffeine-containing energy drink improves sprint performance during an international rugby sevens competition
|
|---|---|
| Published in |
Amino Acids, March 2013
|
| DOI | 10.1007/s00726-013-1473-5 |
| Pubmed ID | |
| Authors |
Juan Del Coso, Javier Portillo, Gloria Muñoz, Javier Abián-Vicén, Cristina Gonzalez-Millán, Jesús Muñoz-Guerra |
| Abstract |
The aim of this study was to determine the effects of a caffeine-containing energy drink on physical performance during a rugby sevens competition. A second purpose was to investigate the post-competition urinary caffeine concentration derived from the energy drink intake. On two non-consecutive days of a friendly tournament, 16 women from the Spanish National rugby sevens Team (mean age and body mass = 23 ± 2 years and 66 ± 7 kg) ingested 3 mg of caffeine per kg of body mass in the form of an energy drink (Fure(®), ProEnergetics) or the same drink without caffeine (placebo). After 60 min for caffeine absorption, participants performed a 15-s maximal jump test, a 6 × 30 m sprint test, and then played three rugby sevens games against another national team. Individual running pace and instantaneous speed during the games were assessed using global positioning satellite (GPS) devices. Urine samples were obtained pre and post-competition. In comparison to the placebo, the ingestion of the energy drink increased muscle power output during the jump series (23.5 ± 10.1 vs. 25.6 ± 11.8 kW, P = 0.05), running pace during the games (87.5 ± 8.3 vs. 95.4 ± 12.7 m/min, P < 0.05), and pace at sprint velocity (4.6 ± 3.3 vs. 6.1 ± 3.4 m/min, P < 0.05). However, the energy drink did not affect maximal running speed during the repeated sprint test (25.0 ± 1.5 vs. 25.0 ± 1.7 km/h). The ingestion of the energy drink resulted in a higher post-competition urine caffeine concentration than the placebo (3.3 ± 0.7 vs. 0.2 ± 0.1 μg/mL; P < 0.05). In summary, 3 mg/kg of caffeine in the form of a commercially available energy drink considerably enhanced physical performance during a women's rugby sevens competition. |
X Demographics
The data shown below were collected from the profiles of 21 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 States | 8 | 38% |
| United Kingdom | 3 | 14% |
| Australia | 2 | 10% |
| New Zealand | 1 | 5% |
| United Arab Emirates | 1 | 5% |
| Brazil | 1 | 5% |
| Italy | 1 | 5% |
| Ireland | 1 | 5% |
| Unknown | 3 | 14% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 11 | 52% |
| Practitioners (doctors, other healthcare professionals) | 7 | 33% |
| Scientists | 3 | 14% |
Mendeley readers
The data shown below were compiled from readership statistics for 276 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Spain | 1 | <1% |
| Unknown | 275 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 51 | 18% |
| Student > Master | 45 | 16% |
| Student > Ph. D. Student | 24 | 9% |
| Researcher | 18 | 7% |
| Professor | 15 | 5% |
| Other | 39 | 14% |
| Unknown | 84 | 30% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 106 | 38% |
| Nursing and Health Professions | 24 | 9% |
| Medicine and Dentistry | 17 | 6% |
| Biochemistry, Genetics and Molecular Biology | 8 | 3% |
| Agricultural and Biological Sciences | 6 | 2% |
| Other | 26 | 9% |
| Unknown | 89 | 32% |
Attention Score in Context
This research output has an Altmetric Attention Score of 16. 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 18 November 2020.
All research outputs
#2,103,020
of 23,861,036 outputs
Outputs from Amino Acids
#114
of 1,546 outputs
Outputs of similar age
#17,189
of 197,385 outputs
Outputs of similar age from Amino Acids
#5
of 16 outputs
Altmetric has tracked 23,861,036 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 91st percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,546 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 7.1. This one has done particularly well, scoring higher than 92% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 197,385 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 91% of its contemporaries.
We're also able to compare this research output to 16 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 75% of its contemporaries.