Dietary Supplements
Conditions
Interventions
This was a two-arm, double-blind, randomized, controlled crossover clinical study. Ten male swimmers participated in a two-arm crossover design in a randomized order determined by an online algorithm
Sponsors
Universidade Federal de Santa Catarina
Universidade do Estado de Santa Catarina
Eligibility
Sex/Gender
Male
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: Be at least 18 years of age; to be of the masculine gender; regularly training and competing in swimming for at least 5 years; being free from chronic diseases; self-report of not regularly using any substance that could interfere with metabolic responses; self-report of not regularly using any nutritional supplement containing intracellular buffers
Exclusion criteria
Exclusion criteria: Possess a physical limitation that makes them unable to swim; engage in physical activity within 24 hours preceding the tests
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| A quicker 50-meter freestyle swimming time, measured by a digital stopwatch, is expected with caffeine supplementation compared to a placebo;With caffeine supplementation, it's expected there will be less of a decline in isometric shoulder flexion muscular strength compared to the placebo. This strength will be measured before and after the 50-meter time trial using an isometric voluntary contraction on a swimming bench with a force transducer;It is expected to find a higher blood lactate concentration measured immediately after caffeine supplementation and after the 50-meter time trial, measured by a capillary blood sample and analyzed in an electrochemical analyzer, under caffeine supplementation compared to placebo supplementation | — |
Secondary
| Measure | Time frame |
|---|---|
| No secondary outcomes are expected | — |
Countries
Brazil
Contacts
Public ContactFernando Borszcz
Universidade do Estado de Santa Catarina
Outcome results
None listed