Skip to main content
Clinical Trials/NCT05567926
NCT05567926CompletedNot Applicable

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

University of Primorska2 sites in 1 country20 target enrollmentStarted: October 1, 2022Last updated:
Conditions

Trial Snapshot

Phase
Not Applicable
Status
Completed
Enrollment
20
Locations
2
Primary Endpoint
Knee extension strength

Study Overview

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.

Detailed Description

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.

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Crossover
Primary Purpose
Other
Masking
Triple (Participant, Investigator, Outcomes Assessor)

Eligibility Criteria

Ages
18 Years to 30 Years (Adult)
Sex
All
Accepts Healthy Volunteers
Yes

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
  • Consumption of drugs such as antacids and proton pump inhibitors in the previous 3 months
  • Pregnant or breastfeeding women
  • Beetroot allergic participants

Outcomes

Primary Outcomes

Knee extension strength

Time Frame: 2 hours after the ingestion of beetroot juice or placebo

The peak force during maximal voluntary contraction of knee extensors

Secondary Outcomes

  • Knee extension local muscle endurance(2 hours after the ingestion of beetroot juice or placebo)
  • Knee extension explosive strength(2 hours after the ingestion of beetroot juice or placebo)

Investigators

Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

Zala Jenko Praznikar

Associate Professor

University of Primorska

Study Sites (2)

Loading locations...

Similar Trials