Acute Effects of Beetroot Juice on Isometric Knee Extension Strength, Explosive Strength and Local Muscular Endurance

NCT ID: NCT05567926

Last Updated: 2022-10-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-10-01

Study Completion Date

2022-10-17

Brief Summary

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This is a double-blind placebo-controlled cross-over trial that aims to determine the acute effect of beetroot juice ingestion on isometric knee extension strength, explosive strength and local muscular endurance.

Detailed Description

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The study aims to determine whether concentrated beetroot juice has an acute effect on isometric strength of the knee muscles and the rate of force development in knee extension, as well as endurance of the same muscle. This will be a cross-over study. 20 subjects will be randomly selected to the experimental group or control group; after 1 week, participants will repeat the measurements in the other condition. Subjects will consume 140 ml of beetroot juice extract 2.5 hours before the measurement or placebo (140 ml of blackcurrant juice with added appropriate amount of sugar to equalize the carbohydrate value and lemon juice fort the taste). An isometric dynamometer will be used to measure the isometric strength of the knee extensors. Investigators will quantify peak force, rate of force development, endurance of knee extensors at 50 % of the maximal force, and the force recovery after a fatiguing protocol.

Conditions

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Healthy Adults

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

OTHER

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors

Study Groups

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Experimental condition, receiving beetroot juice supplement

Participants will receive beetroot juice intervention in the experimental condition.

Group Type EXPERIMENTAL

Beetroot juice concentrate (140 ml)

Intervention Type DIETARY_SUPPLEMENT

A beetroot juice concentrate (140 ml) will be administered to participants in experimental conditions.

Placebo condition

Participants will receive placebo (blackcurrant juice) in the placebo condition

Group Type PLACEBO_COMPARATOR

Blackcurrant juice (placebo)

Intervention Type DIETARY_SUPPLEMENT

140 ml of blackcurrant juice with added appropriate amount of sugar to equalize the carbohydrate value and lemon juice fort the taste.

Interventions

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Beetroot juice concentrate (140 ml)

A beetroot juice concentrate (140 ml) will be administered to participants in experimental conditions.

Intervention Type DIETARY_SUPPLEMENT

Blackcurrant juice (placebo)

140 ml of blackcurrant juice with added appropriate amount of sugar to equalize the carbohydrate value and lemon juice fort the taste.

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* Age between 18 and 30 years
* Physically active and healthy athletes (recreational or professional)

Exclusion Criteria

* Cardiovascular, pulmonary, metabolic, neurological diseases and musculoskeletal injuries
* Smokers
* Consumption of drugs such as antacids and proton pump inhibitors in the previous 3 months
* Pregnant or breastfeeding women
* Beetroot allergic participants
Minimum Eligible Age

18 Years

Maximum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Primorska

OTHER

Sponsor Role lead

Responsible Party

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Zala Jenko Praznikar

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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University of Primorska Faculty of Health Sciences

Izola, , Slovenia

Site Status

Countries

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Slovenia

Other Identifiers

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BEETROOT

Identifier Type: -

Identifier Source: org_study_id

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