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Effects of Caffeine and Capsaicin on Performance of Brazilian Jiu-Jitsu Athletes

Investigation into the possible acute effects of caffeine and capsaicin supplementation on performance and psychophysiological responses in Brazilian jiu-jitsu athletes

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
REBEC
Registry ID
RBR-4fxmhs7
Enrollment
12
Registered
2026-03-16
Start date
2025-12-17
Completion date
Unknown
Last updated
2026-03-30

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

Conditions

Martial Arts Dietary Supplements

Interventions

This is a randomized, placebo-controlled, double-blind clinical trial with four experimental conditions that will investigate the acute effects of caffeine and capsaicin supplementation administered i

Sponsors

Escola de Educação Física da Universidade Federal de Minas Gerais
Lead Sponsor
Universidade Federal de Minas Gerais
Collaborator
Escola de Educação Física da Universidade Federal de Minas Gerais
Collaborator

Eligibility

Sex/Gender
Male
Age
18 Years to 35 Years

Inclusion criteria

Inclusion criteria: Male Brazilian Jiu-Jitsu athletes. Age between 18 and 35 years. Minimum blue belt rank. Regular practice of Brazilian Jiu-Jitsu training for at least 12 months. Absence of self-reported musculoskeletal injuries in the upper limbs in the previous six months. Agreement to abstain from consuming products containing caffeine and other ergogenic supplements at least 48 hours before each experimental session. Voluntary participation through signing the Informed Consent Form.

Exclusion criteria

Exclusion criteria: History of cardiovascular, metabolic, neurological, or gastrointestinal diseases. Use of medications or supplements that may interfere with physical performance or cardiovascular responses. Hypersensitivity or intolerance to caffeine or capsaicin. Smoking. Alcohol consumption in the 24 hours prior to experimental sessions. Failure to comply with the pre-test recommendations established by the experimental protocol. Occurrence of adverse effects related to supplementation during experimental sessions. Voluntary withdrawal of the participant at any stage of the study.

Design outcomes

Primary

MeasureTime frame
An increase in the maximum number of dynamic repetitions in the pull-up test with kimono grip is expected, with higher values in the combined supplementation condition of caffeine and capsaicin compared with the other experimental conditions after adjustment for body mass.

Secondary

MeasureTime frame
A reduction in rating of perceived exertion is expected in the isolated capsaicin supplementation condition compared with the other experimental conditions;An increase in blood lactate concentration and heart rate is expected in the isolated caffeine supplementation condition compared with the other experimental conditions.;An increase in peak force in the handgrip strength test is expected, with higher values in the combined supplementation condition of caffeine and capsaicin compared with the other experimental conditions after allometric normalization.;An increase in the maximum isometric hold time in the pull-up test with kimono grip is expected, with higher values in the combined supplementation condition of caffeine and capsaicin compared with the other experimental conditions after allometric correction.

Countries

BR

Contacts

Public ContactMarcos Motta Drummond

Universidade Federal de Minas Gerais

treinandoprosucesso@gmail.com+55-31-84777369

Outcome results

None listed

Source: REBEC (via WHO ICTRP) · Data processed: Apr 4, 2026