Caffeine
Conditions
Keywords
ergogenic aid, sport performance, reaction time, anticipation, attention, memory
Brief summary
Caffeine is a potent central nervous system stimulant that increases the activity in the prefrontal cortex and can improve cognitive skills. An improvement in these cognitive skills can lead to further benefits in athletic performance. Therefore, it is necessary to clarify the dose-response of caffeine on cognitive performance.The aim of this research will be to determine the effects of different doses of caffeine on sport-related cognitive aspects.
Detailed description
The investigators will require healthy, physically active young adults to complete three trials under the conditions: a) placebo, b) 3 mg/kg, or c) 6 mg/kg body mass of caffeine. In each trial, different cognitive abilities will be assessed using the following test batteries: reaction time (DynavisionTM D2), anticipation (Bassin Anticipation Timer), sustained attention (Go/No-Go and Eriksen Flanker Test) and memory tests. In addition, side effects and the perceived sensation index will be recorded 24 h after each test.
Interventions
DIETARY_SUPPLEMENTPLACEBO
3 mg/kg of cellulose (0 mg/kg of caffeine)
DIETARY_SUPPLEMENT3 mg/kg of caffeine
Ingestion of 3 mg/kg of body mass of caffeine
DIETARY_SUPPLEMENT6 mg/kg of caffeine
Ingestion of 6 mg/kg of body mass of caffeine
Sponsors
University of Castilla-La Mancha
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Masking description
To achieve the blinded placebo situation, a researcher not associated with the study will be performed the blinding and prepared identical capsules containing placebo or the corresponding dose of caffeine. This researcher will be assigned an alphanumeric code to each trial to blind participants and investigators
Eligibility
Sex/Gender
ALL
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* Physically active individuals ( \>150 min/week moderate physical activity or \>75 min/week vigorous physical activity) * Individuals without serious and undiagnosed health problems.
Exclusion criteria
* Individuals with color blindness. * Regular caffeine consumers (\>3 cups of coffee/day).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Reaction Time | 10 minutes | Reaction time (in seconds) shall be assessed with the Dynavision™ D2 Visomotor Device using the Reaction Time Test. In this test the fastest visual, motor and physical reaction time will be measured. |
| Anticipation | 5 minutes | Visual acuity related to hand-eye coordination and anticipation will be assessed using the Bassin Anticipation Timer instrument. The best anticipation time (in seconds) of each condition (5, 10 and 15 mph) will be taken. |
| Sustained attention | 10 minutes | The ability of maintaining the attention and inhibiting an appropriate response will be measured by Go/No-Go Test \[fastest, slowest, and average response time (in seconds), and successful attempts (percentage; %)\] and Eriksen Flanker Test \[congruent and incongruent reaction time (in seconds)\]. |
| Memory | 20 minutes | To study the modulation of memory storage processes, three 20-item word lists were created. Each word in the list will be presented for 5 s. This will be followed by a 100 s memory consolidation interval, after which there will be a 120 s period in which as many words as the participants can remember will be written down (First time). After 15 min, participants will perform a recall task (Second time) in which they will have to rewrite all the words they remember at that time. |
Countries
Spain
Outcome results
None listed