NCT05567926

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

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

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 20 (actual)
• Sponsor: University of Primorska · Academic / Other
• Sex: All
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

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.

Conditions

• Healthy Adults

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Beetroot juice concentrate (140 ml)	A beetroot juice concentrate (140 ml) will be administered to participants in experimental conditions.
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.

Timeline

• Start date: 2022-10-01
• Primary completion: 2022-10-15
• Completion: 2022-10-17
• First posted: 2022-10-05
• Last updated: 2022-10-19

Locations

1 site across 1 country: Slovenia