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Effect of Caffeine or Transcranial Direct Current Stimulation on attack decision-making in trained beach volleyball players after prolonged cognitive effort by use of social media: a study crossover randomized

Caffeine and Transcranial Direct Current Stimulation: effect on the performance of mentally fatigued young athletes

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
REBEC
Registry ID
RBR-2yyd8jb
Enrollment
Unknown
Registered
2024-01-22
Start date
2023-03-01
Completion date
Unknown
Last updated
2025-10-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mental Fatigue

Interventions

This is a four-arm study
therefore, the interventions will involve the use of Caffeine or placebo, as well as the application of Transcranial Direct Current Stimulation and placebo, which will be conducted separately. Partici
then, the device is turned off. Additionally, a light remains on to prevent athletes from identifying the condition, thus they will be blinded. All 16 athletes will go through all conditions in a cros
E02.331.750

Sponsors

Yago Pessoa da Costa
Lead Sponsor
Universidade Federal da Paraíba
Collaborator

Eligibility

Sex/Gender
Male
Age
No minimum to 22 Years

Inclusion criteria

Inclusion criteria: Training beach volleyball for at least two years; compete on the regional circuit; have competed in the previous year on the national circuit; be at least 22 years old; male

Exclusion criteria

Exclusion criteria: Withdraw from the research for any reason; sustain an injury during the research; fail to comply with recommended procedures

Design outcomes

Primary

MeasureTime frame
The interventions, Caffeine and Transcranial Direct Current Stimulation, are expected to attenuate the perception of mental fatigue and the reduction in performance on the Stroop task caused by social media;As a result of reducing the negative effect of social media use, better performance in decision-making in the beach volleyball attack is expected. This improvement will be evaluated later through recorded videos of the games. A detailed analysis of the decisions will be carried out

Secondary

MeasureTime frame
No secondary outcomes are expected

Countries

Brazil

Contacts

Public ContactYago da Costa

Universidade Federal da Paraíba

yago_pessoa@hotmail.com+55(83)32167200

Outcome results

None listed

Source: REBEC (via WHO ICTRP) · Data processed: Feb 5, 2026