Athletes
Conditions
Keywords
Caffeine, Sodium Bicarbonate, Isometric Contraction, Performance-Enhancing Substances
Brief summary
The aim of this study was to investigate the effects of isolated and combined caffeine and sodium bicarbonate consumption on acute isometric mid-thigh pull (IMTP) strength, and verify whether they are cumulative, neutral or subtractive.
Detailed description
Method: Nineteen Sport Sciences Faculty students (Age 23.6±1.6 years, height 171±9.4 cm, weight 64.3±9.6 kg, fat percentage 20.5±7.3 %, BMI 21.7±2.4 kg/m2) participated and completed the intervention. This study was designed as crossover, double-blind and placebo-controlled. Subjects participated under 5 crossover conditions: control (without supplement) (Con), placebo (Pla), caffeine (Caf), sodium bicarbonate (NaHCO3) and caffeine+sodium bicarbonate (Caf+NaHCO3). For Caf conditions, participants consumed 6 mg/kg of caffeine, obtained from dosing the content of 200 mg capsules. As for NaHCO3 conditions, participants consumed 0.3 g/kg of sodium bicarbonate dissolved in water. For the combined condition, (Caf+NaHCO3), intake was set at 6 mg of caffeine and 0.3 g of sodium bicarbonate per kilogram of body weight. All supplements were consumed 60 min before the tests. Two submaximal trials of IMTP were performed at increasing intensities for 5 seconds (approximately %40-60 and %60-80 of their individually perceived 1RM, respectively, with 60-second rest intervals).
Interventions
OTHERPerformance-Enhancing Substances
All supplements were consumed 60 min before the isometric mid-thigh pull tests, to reach peak blood concentrations at evaluation time. Immediately after consumption, both Control and intervention participants rested in a quiet laboratory environment (Eskişehir Technical University, Laboratory of Human Athletic Performance), until the strength tests. Participants were previously informed verbally and in writing that they should abstain from caffeine consumption (any caffeine-containing beverages and foods, such as coffee or tea, energy drinks, cocoa and cocoa-containing foods, chocolate and chocolate-containing foods or caffeine-containing drugs) for at least 24 hours before
OTHERPlacebo
20gr of maltodextrin (European origin, Alfasol®, Kimbiotek, Turkey)
OTHERBaseline (Control)
No supplement conditions
Sponsors
Bozok University
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
DOUBLE (Subject, Investigator)
Masking description
Supplement preparation, as well as the provision and management of blind conditions for both participants and investigators, were performed by a researcher (Celil KAÇOĞLU) who did not participate in the strength measurements.
Intervention model description
subjects participated under 5 crossover conditions: control (without supplement) (Con), placebo (maltodextrin) (Pla), caffeine (Caf), sodium bicarbonate (NaHCO3) and caffeine+sodium bicarbonate (Caf+NaHCO3). The control measurement was made as a baseline measurement without supplementation.
Eligibility
Sex/Gender
ALL
Age
18 Years to 24 Years
Healthy volunteers
Yes
Inclusion criteria
* Being physically active and healthy * Did not use ergogenic supplements in the last 3 months * Did not consume high doses of caffeine (≤120-170 mg/d) were included in this study
Exclusion criteria
* Actively using supplements * Did not perform maximal effort during performance tests * Not using the supplements in the correct dose or vomiting after use
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Isometric Mid-Thigh Pull (IMTP) | immediately after the intervention | to investigate the effects of isolated and combined caffeine and sodium bicarbonate consumption on acute isometric mid-thigh pull (IMTP) strength, and verify whether they are cumulative, neutral or subtractive |
Countries
Turkey (Türkiye)
Outcome results
None listed