Acute Effects of Beetroot Juice Ingestion on Cognitive Function and Neuromuscular Performance in Elite Female Taekwondo Athletes

NCT06675305 | Completed

• 1 other identifier: Ethics Committee: 22/172-E_TFM
• Study Type: interventional
• Target: 7
• Locations: 1 country
• Sites: 1

Brief Summary

Beetroot juice is a good source of nitrate (NO3-), which is a precursor of nitric oxide (NO) through the NO3- to nitrite (NO2-) to NO pathway (Lundberg et al., 2008). Consequently, it is thought that a minimum threshold may exist for dietary NO3- consumption of at least 5 mmol to enhance athletic performance (Senefeld et al., 2020). In turn, systematic reviews have documented that the use of beetroot juice supplementation enhances muscle strength and power-related attributes (Gonzalez et al., 2023), as well as performance in repeated high-intensity activity bouts (Alsharif et al., 2023; Dominguez et al., 2018). However, beetroot juice supplementation has been shown to have equivocal effects on neuromuscular performance specifically among individual sport athletes (e.g. taekwondo). Thus, the aim of this study was to determine the effects of acute beetroot juice ingestion (140 mL, 12.8 mmol NO3-) on neuromuscular performance in elite female taekwondo athletes.

Conditions

Dietary Supplements: Beetroot Juice Acute Supplementation; Dietary Supplement: Placebo Acute Supplementation

Keywords

nitrate; nitrite; neuromuscular; taekwondo

Outcome Measures

Primary Outcomes (1)

• Simulated taekwondo Combat (actions/time)

  Simulated taekwondo combat were performed according to the guidelines of the World Taekwondo (WT), and participants were divided based in the Olympic weight categories (WT, 2016). All the combats were executed in an official octagonal and homologated competition area while an international referee (who doesn´t know the experimental treatments) arbitrated. Today the rules of WTF led to use electronic protectors as protecting of athletes and identify electronically the punctuations (Del Vecchio, Franchini, Del Vecchio, \& Pieter, 2011). Variables analyzed were attack time (AT), step time (ST), pause time (PT), period without attack (PWA = ST+PT), numbers of attacks (AN), the ratio for attack time and step time (R1 = AT/ST), and ratio for action time and step time (R2 = (AT+ST) /PT).

  1-week

Secondary Outcomes (4)

• Changes in maximal jump height (cm)

  1-week

• Reaction time (ms)

  1-week

• Blood lactate concentrations (mmol·L-1)

  1-week

• Rating of percevied exertion (RPE) (measured using scale 6-20 points)

  1-week

Study Arms (2)

Beetroot juice supplementation

EXPERIMENTAL

140 mL of beetroot juice (12.8 mmol of NO3-, Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) made from concentrates of beetroot juice (98%) and lemon juice (2%) (nutritional information (per 100 mL), energy: 373 kJ; fat: 0 g; carbohydrates: 18 g \[sugars: 17 g\]; protein: 3.7 g; salt: 0.48 g)

Dietary Supplement: Beetroot juice (James White, UK)

Placebo supplementation

PLACEBO COMPARATOR

140 mL of beetroot juice placebo without nitrates (0.08 mmol of NO3-, Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) made from concentrates of beetroot juice (98%) and lemon juice (2%) (nutritional information (per 100 mL), energy: 373 kJ; fat: 0 g; carbohydrates: 18 g \[sugars: 17 g\]; protein: 3.7 g; salt: 0.48 g)

Dietary Supplement: Placebo acute supplementation (James White, UK)

Interventions

Beetroot juice (James White, UK) DIETARY_SUPPLEMENT

One serving 140 mL of BJ (12.8 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) after an overnight fast and 2.5 h before initiating the testing session.

Beetroot juice supplementation

Placebo acute supplementation (James White, UK) DIETARY_SUPPLEMENT

One serving 140 mL of BJ (0.04 mmol of NO3-; Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) after an overnight fast and 2.5 h before initiating the testing session.

Also known as: Beetroot juice placebo

Placebo supplementation

Eligibility Criteria

• Age: 16 Years - 40 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Age between 16 to 40 years
• Competed in international taekwondo competitions representing her national teams.
• More than6 years of training experience (at least 3 sessions per week).
• Female taekwondo athletes.

You may not qualify if:

• Male taekwondo athletes.

Sponsors & Collaborators

• Universidad Pontificia Comillas: lead
• Universidad Complutense de Madrid: collaborator
• University of Seville: collaborator

Study Sites (1)

Universida Pontificia Comillas

Madrid, Spain

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 4, 2024
• First Posted: November 5, 2024
• Study Start: May 1, 2022
• Primary Completion: July 1, 2022
• Study Completion: August 15, 2022
• Last Updated: November 5, 2024

Record last verified: 2024-11

Data Sharing

• IPD Sharing: Will not share

Locations

ES (1)