Caffeine and Resistance Exercise
Conditions
Brief summary
Introduction: Several studies have evaluated and confirmed the ergogenic effects of acute caffeine intake on sports performance. However, the mechanism responsible for this ergogenic effect remains to be elucidated. Objectives: This study aims to evaluate the acute effects of caffeine intake on muscle and cerebral oxygen during muscular strength, power, muscle endurance performance. and muscle electrical activity in young adults.
Interventions
DIETARY_SUPPLEMENTCaffeine
Acute caffeine intake (3 mg/kg)
DIETARY_SUPPLEMENTPlacebo
Acute placebo intake (3 mg/kg)
Sponsors
University of Alcala
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
DOUBLE (Subject, Investigator)
Masking description
Statistician
Eligibility
Sex/Gender
MALE
Age
18 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Age between 18 and 35 years. * Body Mass Index (BMI) < 25 kg/m². * Resistance-trained individuals (more than 2 years of structured training). * Healthy men and women without neurological, cardiometabolic, immunological, or physical conditions that prevent them from exercising. * Participants must be able to perform the tests described in the following section.
Exclusion criteria
* History of neuromuscular diseases, heart disease, or conditions that may affect liver or muscle metabolism. * Use of drugs, stimulants, or sports supplements that could interfere with the dietary supplement used in the study. * Sedentary habits (less than 150 minutes/week of moderate exercise). * Having undergone prolonged periods of physical inactivity in the 6 months prior to the study. * Engaging in strenuous exercise within 48 hours prior to the tests. * Failure to replicate the same food intake on both experimental days. * Consumption of caffeine or any other stimulant after 6 pm on the day before the tests, to avoid headaches, discomfort, or lethargy in regular caffeine consumers.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Muscle Oxygenation | Through study completion, an average of 2 weeks | Measuring oxygen in the muscle before and after exercise. |
| Cerebral oxygenation | Through study completion, an average of 2 weeks | Measuring cerebral oxygenation before and after exercise. |
| Number of repetitions performed in 1 set at 65%1RM until task failure | Through study completion, an average of 2 weeks | — |
| Bar velocity deplacement performed in 1 set at 65%1RM until task failure | Through study completion, an average of 2 weeks | In bench press and back squat exercises |
| Power output generated in 1 set at 65%1RM until task failure | Through study completion, an average of 2 weeks | In bench press and back squat exercise |
Countries
Spain
Outcome results
None listed