Healthy volunteers
Conditions
Interventions
26 subjects will visit the laboratory on two occasions: saline and caffeine treatment. The subjects will be their own controls. Treatment will be blinded to avoid placebo effect. The initial part of t
Dietary supplement
Y50.2
Sponsors
Universidade Federal de Santa Catarina
Universidade Federal de Santa Catarina
Eligibility
Sex/Gender
Male
Age
18 Years to 25 Years
Inclusion criteria
Inclusion criteria: Healthy subjects; male; age between 18 and 25 years; do not practice physical activities regularly. more than 150 minutes per week.
Exclusion criteria
Exclusion criteria: Lumbar disease; cardiac arrhythmia; convulsion; gastric problems; use of nutritional supplements or ergogenic aids; structural or functional deformities; cognitive problems; smoking; use of tricyclic antidepressants; use of caffeine-containing medicines; hypertension; diabetes; BMI over 25; phobia for blood collection.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Expected outcome 1, delay in electromyographic fatigue is expected to be found in caffeine treatment for the multifidus muscle and the transverse / oblique abdominal muscle during the Sorensen test. Verified by the median frequency assessment method of the surface electromyography performed throughout the test.;Outcome 1, 10% delay in fatigue was observed during the Sorensen test for the transverse internal / oblique abdominal muscle assessed by the decline in the median frequency.;Expected Outcome 2, an increase in physical performance is expected for caffeine treatment. Verified by time spent on Sorensen test.;Expected Outcome 2, an improvement in physical performance was observed for 20 seconds of increased stay in the test position when compared to caffeine treatment with placebo.;Expected Outcome 3, increased muscle recruitment is expected for caffeine treatment for the multifidus muscle and for the transverse / oblique internal muscle during the Sorensen test. Verified by Root Mean Square assessment method of surface electromyography performed throughout the test.;Outcome found 3, a 5% increase in msucular recruitment was observed during the Sorensen test for the multifidus muscle assessed by increasing the Root Mean Square electromyographic parameter.;Expected Outcome 4, a decrease in subjective perception of exertion is expected during the Sorensen test for caffeine treatment. Verified through the Borg Subjective Effort Scale.;Outcome 4, a significant 10% decrease in perceived exertion was observed on the day the Sorensen test was performed with caffeine treatment, corresponding to a mild and moderate classification according to the scale.;Expected Outcome 5, caffeine is expected to decrease the subjective sensation of pain during the Sorensen test. Verified through the Visual Analog Pain Scale.;Outcome 5, it was observed that caffeine did not change pain sensation during the Sorensen test, resulting in a moderate level for both cases according to the scale. | — |
Secondary
| Measure | Time frame |
|---|---|
| Expected Outcome 1. Increased capillary blood lactate concentration is expected for caffeine treatment. Checked by blood analysis on the lactimeter immediately after the test.;Outcome 1. There was a 5% increase in lactate concentration on the day subjects were treated with caffeine.;Expected Outcome 2. An increase in heart rate is expected for the day of caffeine treatment. Checked by frequency meter every 15 seconds.;Outcome Found 2. A 10-15 bpm increase in heart rate was observed on the day subjects were treated with caffeine compared with placebo.;Expected Outcome 3. An increase in systolic and diastolic blood pressure is expected for the day of caffeine treatment. Verified by the sphygmoamometer pre and post strength test.;Outcome found 3. A 10 mmHg increase in post-systolic blood pressure was observed. | — |
Countries
Brazil
Contacts
Public ContactAderbal Aguiar Junior
Universidade Federal de Santa Catarina
Outcome results
None listed