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临床试验/NCT05567926
NCT05567926已完成不适用

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

University of Primorska2 个研究点 分布在 1 个国家目标入组 20 人开始时间: 2022年10月1日最近更新:
适应症

试验速览

阶段
不适用
状态
已完成
入组人数
20
试验地点
2
主要终点
Knee extension strength

研究概览

简要总结

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.

详细描述

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.

研究设计

研究类型
Interventional
分配方式
Randomized
干预模型
Crossover
主要目的
Other
盲法
Triple (Participant, Investigator, Outcomes Assessor)

入排标准

年龄范围
18 Years 至 30 Years(Adult)
性别
All
接受健康志愿者

入选标准

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

排除标准

  • 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

结局指标

主要结局

Knee extension strength

时间窗: 2 hours after the ingestion of beetroot juice or placebo

The peak force during maximal voluntary contraction of knee extensors

次要结局

  • 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)

研究者

申办方类型
Other
责任方
Principal Investigator
主要研究者

Zala Jenko Praznikar

Associate Professor

University of Primorska

研究点 (2)

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