Caffeine
Conditions
Interventions
Experimental group 1: 16 healthy recreational active men with no high caffeine consumption were selected to participate in the study, receiving an average dose of caffeine (6mg. Kg body). Experimental
Dietary supplement
G07.203.300.456
Sponsors
Universidade Federal do Paraná
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Eligibility
Sex/Gender
Male
Age
18 Years to 23 Years
Inclusion criteria
Inclusion criteria: Recreationally active adults; practicing strength training at least 150 minutes a week; male
Exclusion criteria
Exclusion criteria: Habitual caffeine users; individuals not used to strength training; be participating in another study during the analyzes; present an injury or physical impairment that prevented the tests from being performed; cardiovascular diseases; smoker; use of other supplements during testing
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Expected outcome 1: Assess whether supplementation with high doses of caffeine (8mg. Kg body) promotes more significant improvements in maximum strength when compared to the control group (15-20% better) or lower doses of caffeine (5-8% better ), being evaluated through a protocol of 10 maximum repetitions (10-RM) in the bench press, squat and deadlift exercises to estimate the one maximum repetition values.;Outcome found 1: It was observed that supplementation with higher doses of caffeine (8mg. Kg body) promoted significant improvements in the estimation of the maximum strength, analyzed through the 10-RM test, improving the strength by 7.5% in the bench press, 10.6% in the squat and 12.9% in the deadlift compared to the control group, presenting less expressive results when compared to the lower doses of caffeine, raising the estimated maximum strength in the bench press by 3.4%, 5.2% in the squat and 8.5% on the deadlift. | — |
Secondary
| Measure | Time frame |
|---|---|
| Expected outcome 1: Assess whether supplementation with higher doses of caffeine promotes more significant reductions in the perceived exertion compared to the control group (reductions of 20-30%) and lower doses of caffeine (reductions of 5-10%), being assessed through the OMNI perception scale.;Outcome found 1: It was observed that there were no significant differences between the rate of perceived exertion observed through the OMNI scale between the group that supplemented with higher doses of caffeine with the control group (~3%). The group that supplemented with moderate doses of caffeine had a 15% higher rate of perceived exertion compared to the group that supplemented with a higher dose of caffeine and 17% higher when compared to the control group.;Expected outcome 2: Assess whether high doses of caffeine promote significant reductions in the global oxidative stress variables compared to the control group (reductions of 10-15%), as well as singular reductions (<5%) when compared to moderate caffeine doses. The analyzes of the global oxidative stress were made through blood collections, which sought to analyze the levels of lactate, lactate dehydrogenase, ferritin, and superoxide dismutase.;Outcome found 2: Higher doses of caffeine promoted significant reductions (14%) in global levels of oxidative stress (lactate, lactate dehydrogenase, ferritin, and superoxide dismutase) when compared to the control group. Reductions of ~5% were observed when comparing higher doses of caffeine with moderate doses. | — |
Countries
Brazil
Contacts
Public ContactLuis Boiko Ferreira
Universidade Federal do Paraná
Outcome results
None listed