| Title |
Effects of caffeine on neuromuscular fatigue and performance during high-intensity cycling exercise in moderate hypoxia
|
|---|---|
| Published in |
European Journal of Applied Physiology, November 2016
|
| DOI | 10.1007/s00421-016-3496-6 |
| Pubmed ID | |
| Authors |
Bruno P. C. Smirmaul, Antonio Carlos de Moraes, Luca Angius, Samuele M. Marcora |
| Abstract |
To investigate the effects of caffeine on performance, neuromuscular fatigue and perception of effort during high-intensity cycling exercise in moderate hypoxia. Seven adult male participants firstly underwent an incremental exercise test on a cycle ergometer in conditions of acute normobaric hypoxia (fraction inspired oxygen = 0.15) to establish peak power output (PPO). In the following two visits, they performed a time to exhaustion test (78 ± 3% PPO) in the same hypoxic conditions after caffeine ingestion (4 mg kg(-1)) and one after placebo ingestion in a double-blind, randomized, counterbalanced cross-over design. Caffeine significantly improved time to exhaustion by 12%. A significant decrease in subjective fatigue was found after caffeine consumption. Perception of effort and surface electromyographic signal amplitude of the vastus lateralis were lower and heart rate was higher in the caffeine condition when compared to placebo. However, caffeine did not reduce the peripheral and central fatigue induced by high-intensity cycling exercise in moderate hypoxia. The caffeine-induced improvement in time to exhaustion during high-intensity cycling exercise in moderate hypoxia seems to be mediated by a reduction in perception of effort, which occurs despite no reduction in neuromuscular fatigue. |
X Demographics
The data shown below were collected from the profiles of 64 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 | 13 | 20% |
| United States | 10 | 16% |
| Spain | 5 | 8% |
| Sweden | 2 | 3% |
| Ireland | 1 | 2% |
| Colombia | 1 | 2% |
| Canada | 1 | 2% |
| France | 1 | 2% |
| Brazil | 1 | 2% |
| Other | 8 | 13% |
| Unknown | 21 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 43 | 67% |
| Scientists | 14 | 22% |
| Practitioners (doctors, other healthcare professionals) | 6 | 9% |
| Unknown | 1 | 2% |
Mendeley readers
The data shown below were compiled from readership statistics for 312 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Spain | 1 | <1% |
| Unknown | 311 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 58 | 19% |
| Student > Master | 45 | 14% |
| Student > Ph. D. Student | 23 | 7% |
| Researcher | 19 | 6% |
| Professor > Associate Professor | 11 | 4% |
| Other | 51 | 16% |
| Unknown | 105 | 34% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 88 | 28% |
| Nursing and Health Professions | 28 | 9% |
| Medicine and Dentistry | 25 | 8% |
| Biochemistry, Genetics and Molecular Biology | 14 | 4% |
| Agricultural and Biological Sciences | 9 | 3% |
| Other | 37 | 12% |
| Unknown | 111 | 36% |
Attention Score in Context
This research output has an Altmetric Attention Score of 141. 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 December 2023.
All research outputs
#294,498
of 25,507,011 outputs
Outputs from European Journal of Applied Physiology
#65
of 4,368 outputs
Outputs of similar age
#5,958
of 416,574 outputs
Outputs of similar age from European Journal of Applied Physiology
#2
of 30 outputs
Altmetric has tracked 25,507,011 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,368 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 14.7. This one has done particularly well, scoring higher than 98% of its peers.
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We're also able to compare this research output to 30 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 96% of its contemporaries.