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NCT Number: NCT04987619

Effect of Beetroot Juice Supplements on Lower-limb Strength in Females

This study aims to evaluate the effects of beetroot juice supplements on lower-limb strength and muscular endurance in physically active women, due to the presence of NO3- in beetroot juice.

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Key information

Conditions

Muscular Endurance

Age range

18 year–30 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Studies Research Group in Neuromuscular Responses (GEPREN), University of Lavras, Lavras, Brazil

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About this study

Beetroot juice (BJR) is used as an ergogenic aid, but no study has analyzed its' effects on explosive force production in physically active women. It has been proposed that females could blunt reduction of NO2- to NO based on a higher oxidative skeletal muscle phenotype than males. However, it has been observed a higher increase on plasma NO2- levels after supplementation compared to and a greater enhancement on muscle contractile function.

Based on the absence of any study that has analyzed the effect of NO3- supplements on jump ability and power production on weightlifting on female population; the purpose of this study will be to investigate the possible ergogenic effect of BJR on physically active women on explosive force production and muscular endurance in a lower-limb body weightlifting protocol, due to the presence of NO3- in BJR and its effects.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Physically active females with 18-30 years of age
  • More than 6 months on RT training programs
  • Be familiarized with back squat, leg press and leg extension exercises
  • Not consuming any type of nutritional supplement or anabolic substances in the previous three months or during the study
  • Not suffering from a musculoskeletal injury that could interfere with the exercise protocol during the investigation

Exclusion criteria

  • None

Treatment and study plan

Beetroot juice

Dietary Supplement

Subjects will drink juice 120 minutes before each visit

Capri-Sun

Other

70 mL of blackcurrant beverage, which is depleted of NO3- will be taken 120 min before each visit.

Primary outcomes

  1. Change of height reached in jump

    Time frame: Week 1, 2 and 3.

    Evaluated through CMJ (Counter movement jump) test with a recovery period of 45 seconds between jumps.

Secondary outcomes

  1. Movement velocity

    Time frame: Visit 1 (week 1), 2 (week 2) and 3 (week 3).

    Evaluated at 50% and 75% repetition maximum (RM)

  2. Power on back squat

    Time frame: Visit 1 (week 1), 2 (week 2) and 3 (week 3).

    Evaluated at 50% and 75% repetition maximum (RM)

  3. Muscular endurance test

    Time frame: Visit 1 (week 1), 2 (week 2) and 3 (week 3).

    The test consists of three exercises: back squat, leg press and leg extension. Three series will be performed until concentric failure at 75% RM, three minutes of rest between each series.

  4. Rating of perceived exertion (RPE).

    Time frame: Visit 1 (week 1), 2 (week 2) and 3 (week 3).

    Immediately at the end of the muscular endurance test, participants will be instructed to report their RPE using a scale 1-10 (worse to better outcome).

Sponsors and collaborators

Lead sponsor

Maimónides Biomedical Research Institute of Córdoba

Other

Registry information

Official study title

Acute Effects of Beetroot Juice Supplements on Lower-limb Strength and Muscular Endurance in Physically Active Women: Double-blind Crossover Randomized Trial

Important dates

Study start
2021
Primary completion
2021
Study completion
2021
First posted
Aug 3, 2021
Registry last updated
Aug 31, 2021

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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