Sport, Supplementation
Conditions
Keywords
Sodium bicarbonate, NaHCO3, Combat Sports, Physical capacity, Dummy test
Brief summary
The purpose of this study was to verify the effect of 10-day sodium bicarbonate (NaHCO3) and placebo (PLA) supplementation on physical and specific performance capacity, as well as concentrations of the selected biochemical blood markers in trained combat sports athletes, in a randomised, double-blind, placebo-controlled trial.
Detailed description
Sodium bicarbonate (NaHCO3) was proposed as an ergogenic agent, because it improves high-intensity and resistance exercise performance. Until now the major limitation to NaHCO3 supplementation has been the gastrointestinal (GI) side effects. Therefore, this study aims to examine the effect of chronic, progressive-dose NaHCO3 ingestion on physical capacity and specific performance capacity, and concentrations of the selected biochemical blood markers in trained combat sports athletes, in a randomised, double-blind, placebo-controlled trial.
Interventions
DIETARY_SUPPLEMENTSodium bicarbonate supplementation
The experimental procedure for each athlete included a 10-day NaHCO3 supplementation in a progressive-dose regimen in order to reduce the likelihood of gastrointestinal side effects (from 25 to 100 mg ∙ kg-1). NaHCO3 was administered in the form of unmarked disk-shaped tablets (Alkala T, SANUM, Poland). The tablets were ingested with at least 250 mL of water and could be either swallowed or dissolved in the mouth. On training days the supplements were taken in the morning, in the evening and 1.5 hours before training session. On rest days the supplements were taken in the morning, in the afternoon and in the evening.
DIETARY_SUPPLEMENTPlacebo treatment
The experimental procedure for each athlete included a 10-day placebo administration. Placebo was ingested with at least 250 mL of water. On training days the supplements were taken in the morning, in the evening and 1.5 hours before training session. On rest days the supplements were taken in the morning, in the afternoon and in the evening.
Sponsors
Poznan University of PhysED
Poznan University of Life Sciences
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
17 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* written informed consent from all participants before the study (included aslo informed consents to the participation in the study of athletes under the age of 18 obtained from their parents) * a current medical clearance to practice sports, * training experience: at least 4 years (of combat sport training), * minimum of 4 workout sessions (combat sport) a week,
Exclusion criteria
* current injury, * any health-related contraindication, * declared general feeling of being unwell, * unwilling to follow the study protocol.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in specific performance capacity after sodium bicarbonate supplementation | Baseline and after 10 days | The wrestler's special endurance test - projective test with dummy (DT) |
| Changes in anaerobic capacity after sodium bicarbonate supplementation | Baseline and after 10 days | The Wingate Anaerobic Test (WAnT) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes in blood glucose and hemoglobin concentration after sodium bicarbonate supplementation | Baseline and after 10 days | Hemoglobin (Hb) \[g/dl\] and glucose \[g/dl\] concentration analysis |
| Changes in blood hematocrit levels after sodium bicarbonate supplementation | Baseline and after 10 days | Hematocrit (HCT) \[%\] level analysis |
| Changes of lactate and pyruvate concentration in blood after sodium bicarbonate supplementation | Baseline and after 10 days | Lactate \[mmol/L\] and pyruvate \[mmol/L\] concentration analysis |
| Changes in polyphenols and albumin concentration | Baseline and after 10 days | Polyphenols \[g/L\] and and albumin \[g/L\] concentration analysis |
| Changes in FRAP concentration | Baseline and after 10 days | FRAP \[µmol/L\] concentration analysis |
| Changes of red and white blood cell concentration in blood after sodium bicarbonate supplementation | Baseline and after 10 days | Red blood cells (RBC) \[mln/mm³\] and white blood cells (WBC) \[mln/mm³\] concentration analysis |
| Changes of creatine kinase and lactate dehydrogenase activity in blood after sodium bicarbonate supplementation | Baseline and after 10 days | Creatine kinase \[U/L\] and lactate dehydrogenase \[U/L\] activity analysis |
Countries
Poland
Outcome results
None listed