Beetroot Beverage and Repeated Sprint Power Output During RAST
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Beetroot-based antioxidant beverage.
- Who it may be relevant to
- Registry conditions: Repeated Sprint Performance in Trained Athletes, Exercise Performance, Nitrate Supplementation. Basic parameters: 18 years — 35 years · Male.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
"Effects of a Beetroot-Based Functional Beverage on Repeated Sprint Performance: A Randomized, Double-Blind, Placebo-Controlled Crossover Trial"
Overview
This randomized, double-blind, placebo-controlled crossover trial aims to evaluate the acute effects of a nitrate-rich beetroot-based beverage on repeated sprint performance in trained athletes. Ten athletes will complete two experimental conditions in randomized order: beetroot beverage (BET) and placebo (PLA), separated by a 7-day washout period. The beetroot beverage consists of 200 mL of a mixture containing beetroot, cocoa, and green tea, providing approximately 6.4 mmol of nitrate. In each condition, participants will perform a Running Anaerobic Sprint Test (RAST), consisting of six maximal 35-meter sprints with 10 seconds of passive recovery between sprints. The primary outcome is mean power output across the six sprints. Secondary outcomes include fatigue index, sprint-by-sprint power output, heart rate, rating of perceived exertion (Borg 6-20 scale), maximal oxygen uptake (VO₂max), and sleep quality assessed using the Insomnia Severity Index (ISI).
Detailed description
This randomized, double-blind, placebo-controlled crossover trial is designed to investigate the acute effects of a nitrate-rich beetroot-based beverage on repeated sprint performance in trained athletes.
Ten athletes will participate in two experimental sessions in randomized order: beetroot beverage (BET) and placebo (PLA). Randomization will determine the sequence of beverage administration. Participants and investigators will be blinded to treatment allocation.
After beverage ingestion, participants will perform a standardized warm-up followed by the Running Anaerobic Sprint Test (RAST), consisting of six maximal 35-meter sprints with 10 seconds of passive recovery between sprints. Sprint time will be recorded using electronic timing, and power output will be calculated using body mass and sprint time.
The primary outcome measure is mean power output across all six sprints. Secondary outcomes include:
Fatigue index (percentage decrement across sprints)
Individual sprint power (S1-S6)
Heart rate response
Rating of perceived exertion (Borg 6-20 scale)
VO₂max (assessed at baseline)
Sleep quality measured using the Insomnia Severity Index (ISI)
A linear mixed-effects model will be used to analyze repeated sprint performance, including subject as a random intercept and treatment, sprint, and their interaction as fixed effects. Non-parametric tests will be applied when assumptions of normality are not met. Statistical significance will be set at p ≤ 0.05.
Interventions
- Dietary supplement Beetroot-based antioxidant beverage
Participants consumed 200 mL of a beetroot-based antioxidant beverage containing beetroot, cocoa, and green tea extract, providing approximately 6.4 mmol of dietary nitrate. The beverage was administered 2-3 hours before performing a Running Anaerobic Sprint Test (RAST). The formulation was designed to deliver nitrate and polyphenols with potential ergogenic and antioxidant effects. A 7-day washout period separated crossover conditions.
Primary outcome measures
- Mean power output (W) during six maximal 35-m sprints [Time frame: Baseline and immediately post-intervention.]
Eligibility criteria
Inclusion criteria
- Healthy trained athletes
Age between 18-35 years
Regular training ≥3 times/week
No cardiovascular or metabolic disease
Exclusion Criteria:Healthy trained athletes
Age between 18-35 years
Regular training ≥3 times/week
No cardiovascular or metabolic disease
\-
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Allocation
- Randomized
- Model
- Crossover
- Masking
- Triple blind
- Primary purpose
- Other
Study locations
Center list to be confirmed — check the primary protocol.
Publications
- Ponce Dávila, E. O., Neder Suárez, D., Muñoz Daw, M. de J., Carrasco Legleu, C. E., & Benítez Hernández, Z. P. (2024). Diseño y análisis de una bebida deportiva a base de betabel. Revista Mexicana De Ciencias De La Cultura Física, 3(7), 1-10. https://doi.org/10.54167/rmccf.v3i7.1370
Identifiers
NCT: NCT07473193 · Cl-062-23