Effect of the Beetroot Juice in Portuguese Swimmers

December 9, 2022 updated by: Universidad Francisco de Vitoria

"Effects of Beetroot Juice os Sport Performane in Elite Swimmers. A Randomized Clinical Trial"

Objective: To investigate whether an acute intake of beet juice (BJ) improved the factors of total and split times (performance), stroke frequency and CMJ (biomechanics), lactate and HR (physiology) and RPE-TQR (psychophysiological) in a repeated (performance), stroke frequency and CMJ (biomechanics), lactate and HR (physiology) and RPE-TQR (psychophysiological) in a repeated maximal speed swimming effort in elite swimmers.

Methods: A total of 18 elite swimmers participated in this randomized, double-blind study. In 2 different trials, swimmers ingested a Beet-It injection (70 ml placebo (PL) or a Beet-It injection of 70 ml beet juice (BJ)) 3 hours before undergoing a 2x6x100 m intermittent maximal speed crawl performance test.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

18

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Spain
    • Pozuelo De Alarcón
      • Madrid, Pozuelo De Alarcón, Spain, 28223
        • Universidad Francisco de Vitoria

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years to 21 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. - national and international level swimmers
  2. - healthy swimmers
  3. - no breakfast
  4. - 48 hours with restricted diet of: other sports supplements and beetroot-rich foods

Exclusion Criteria:

  1. -be on medication
  2. - having had breakfast
  3. - have brushed your teeth

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Beetroot juice
The swimmers ingested a shot of Beet-It 70 ml beetroot juice (BJ)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.
Dietary supplement: Beetroot Juice
The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)
Combination product: Placebo
The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)
Placebo Comparator: Placebo
The swimmers ingested a shot of Beet-It (70 ml placebo (PL)) 3 hours before undergoing a 2x6x100m crawl intermittent maximal speed performance test.
Dietary supplement: Beetroot Juice
The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)
Combination product: Placebo
The swimmers drank 3 hours before the test, mL70 of BJ (containing mmol6.4 of NO-3) (Beet-It-Pro Elite Shot, James White Drinks Ltd., Ipswich, UK) or PLA (0.04 mmol of NO-3)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Lactate concentration
Time Frame: 3 hours post-dose of Beetroot juice or Placebo
After qeach even series of 100m (2nd, 4th, 6th and 3' rest), their finger was wiped dry and their blood lactate concentration was measured with a Lactate Pro2 portable analyzer 1 minute after completing each 100m series.
3 hours post-dose of Beetroot juice or Placebo
Rate of Perceived Exertion
Time Frame: 3 hours after ingestion of the beetroot juice
During every 100m, they were asked how much effort they had exerted using the subjective RPE scale as in other studies with BJ and swimming.
3 hours after ingestion of the beetroot juice
Recovery Total Quality Scale
Time Frame: 3 hours after ingestion of the beetroot juice
Before the swimmers performed the next 100m, they were asked how recovered they felt, using another subjective TQR scale.
3 hours after ingestion of the beetroot juice
Total Time
Time Frame: 3 hours after ingestion of the beetroot juice
The complete 2x6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the total times, with the program KINOVEA 0.9.5.
3 hours after ingestion of the beetroot juice
Parcial Time
Time Frame: 3 hours after ingestion of the beetroot juice
The complete 2x6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the split times, with the KINOVEA 0.9.5 program.
3 hours after ingestion of the beetroot juice
Counter Movement Jump
Time Frame: 3 hours after ingestion of the beetroot juice
Swimmers completed three repetitions of CMJ with hands on waist using an infrared jumping system (Optojump Next, Microgate, Bolzano, Italy)
3 hours after ingestion of the beetroot juice

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Stroke rate
Time Frame: from the day of randomization to the last day of the intervention: up to day 7
The complete 2x6x100 main test was recorded with a JVC model GY-HM150E video camera placed on the stand of the facility itself at about 10 m from the start/turn wall (approximately 5 m above and 10 m from the swim lane) to record the entire session. The recording of the session made it possible to calculate the stroke rate, with the KINOVEA 0.9.5 program.
from the day of randomization to the last day of the intervention: up to day 7

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Universidad Francisco de Vitoria

Collaborators

Instituto Politécnico de Bragança
Universidad Politécnica de Madrid.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 30, 2022

Primary Completion (Actual)

May 7, 2022

Study Completion (Actual)

May 7, 2022

Study Registration Dates

First Submitted

December 1, 2022

First Submitted That Met QC Criteria

December 9, 2022

First Posted (Actual)

December 20, 2022

Study Record Updates

Last Update Posted (Actual)

December 20, 2022

Last Update Submitted That Met QC Criteria

December 9, 2022

Last Verified

November 1, 2022

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 79/2022

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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