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

NCT05567926 | Completed

• 1 other identifier: BEETROOT
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Healthy Adults

Keywords

isometric strength; beetroot; nitrates; local muscle endurance; supplementation

Outcome Measures

Primary Outcomes (1)

• Knee extension strength

  The peak force during maximal voluntary contraction of knee extensors

  2 hours after the ingestion of beetroot juice or placebo

Secondary Outcomes (2)

• Knee extension explosive strength

  2 hours after the ingestion of beetroot juice or placebo

• Knee extension local muscle endurance

  2 hours after the ingestion of beetroot juice or placebo

Study Arms (2)

Experimental condition, receiving beetroot juice supplement

EXPERIMENTAL

Participants will receive beetroot juice intervention in the experimental condition.

Dietary Supplement: Beetroot juice concentrate (140 ml)

Placebo condition

PLACEBO COMPARATOR

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

Dietary Supplement: Blackcurrant juice (placebo)

Interventions

Beetroot juice concentrate (140 ml) DIETARY_SUPPLEMENT

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

Experimental condition, receiving beetroot juice supplement

Blackcurrant juice (placebo) DIETARY_SUPPLEMENT

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

Placebo condition

Eligibility Criteria

• Age: 18 Years - 30 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

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

You may not qualify if:

• 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

Sponsors & Collaborators

• University of Primorska: lead

Study Sites (1)

University of Primorska Faculty of Health Sciences

Izola, SI-6310, Slovenia

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: OTHER
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Study Record Dates

• First Submitted: October 2, 2022
• First Posted: October 5, 2022
• Study Start: October 1, 2022
• Primary Completion: October 15, 2022
• Study Completion: October 17, 2022
• Last Updated: October 19, 2022

Record last verified: 2022-10

Locations

SL (1)