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Completed

NCT Number: NCT05657093

Effect of the Beetroot Juice in Portuguese Swimmers

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.

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Key information

Conditions

Ergogenics

Age range

18 year–25 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Universidad Francisco de Vitoria

Madrid, Pozuelo de Alarcón, 28223, Spain

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • - national and international level swimmers
  • - healthy swimmers
  • - no breakfast
  • - 48 hours with restricted diet of: other sports supplements and beetroot-rich foods

Exclusion criteria

  • -be on medication
  • - having had breakfast
  • - have brushed your teeth

Treatment and study plan

Beetroot juice

Dietary Supplement

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

Combination Product

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)

Primary outcomes

  1. 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.

  2. 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. 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.

  4. 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.

  5. 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.

  6. 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)

Secondary outcomes

  1. 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.

Sponsors and collaborators

Lead sponsor

Universidad Francisco de Vitoria

Other

Collaborators

  • Instituto Politécnico de Bragança
  • Universidad Politecnica de Madrid

Registry information

Official study title

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

Important dates

Study start
2022
Primary completion
2022
Study completion
2022
First posted
Dec 20, 2022
Registry last updated
Dec 20, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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