Effects of Beetroot Juice Intake on Performance and Physiological Parameters

NCT ID: NCT06073275

Last Updated: 2023-10-10

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 10 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-11-01
• Study Completion Date: 2019-02-26

Brief Summary

This study was a randomized, double-blind, crossover design for 3 weeks. In the first week, a researcher explained all the experimental procedures to the participants. In the following two weeks, the participants attended the Exercise Physiology laboratory to be assessed in 2 rowing ergometer sessions, separated from each other by a washout period of 7 days, under the same environmental conditions.

In both strictly identical sessions, the participants randomly ingested beetroot juice (BRJ) or placebo (PL) 3 hours before the start of the tests.

Detailed Description

Three hours after BRJ or PL intake, the participants began the 2,000-meter rowing ergometer test. Before starting (pretest) and at the end of the tests (posttest), blood oxygen saturation, rating of perceived exertion (RPE), and blood lactate measurements were taken. During the rowing ergometer tests, performance parameters and cardiorespiratory variables were recorded.

Conditions

Pulmonary Function; Nutrition, Healthy

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: OTHER
• Blinding Strategy: TRIPLE

Study Groups

Beetroot juice intake

Beetroot juice was administered 3 h before the start of the rowing ergometer test since the peak of nitrite in the blood occurs 2-3 h after nitrate ingestion. Beetroot juice was provided in a 140 mL maroon plastic bottle with no label. Participants were provided with a randomized bottle containing 140 mL (\~12.8 mmol, \~808 mg of nitrate) of BRJ Beet-It-Pro Elite Shot concentrate (Beet IT; James White Drinks Ltd., Ipswich, UK).

Group Type: EXPERIMENTAL

Beetroot juice ingestion

Intervention Type: DIETARY_SUPPLEMENT

Beetroot juice ingestion was randomly administered 3 h before the start of the test to the participants in two assessment sessions with a one-week washout between both sessions.

Placebo intake

Placebo was administered 3 h before the start of the rowing ergometer test. Placebo was provided in a 140 mL maroon plastic bottle with no label. Participants were provided with a randomized bottle containing 140 mL. The placebo drink was made by dissolving in 1 liter of water 2g of powdered SUPER BEETROOT (\~ 0.01 mmol, 0.620 mg of nitrate, diet, food, Poland), 100% natural beetroot juice and organic label, and adding lemon juice to imitate the flavor and texture of the beetroot juice drink

Group Type: PLACEBO_COMPARATOR

Placebo ingestion

Intervention Type: DIETARY_SUPPLEMENT

Placebo ingestion was randomly administered 3 h before the start of the test to the participants in two assessment sessions with a one-week washout between both sessions.

Interventions

Beetroot juice ingestion

Beetroot juice ingestion was randomly administered 3 h before the start of the test to the participants in two assessment sessions with a one-week washout between both sessions.

Intervention Type: DIETARY_SUPPLEMENT

Placebo ingestion

Placebo ingestion was randomly administered 3 h before the start of the test to the participants in two assessment sessions with a one-week washout between both sessions.

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

Inclusion Criteria

1. national and/or international level;

2. without cardiovascular, respiratory, metabolic, neurological or orthopedic disorders that may affect the performance of the rowing ergometer test;

3. no consumption of drugs or medicines;

4. no smoking;

5. Informed consent to participate in the study signed by all rowers

Exclusion Criteria

1. Ingestion of nutritional supplements taken in the three months prior to the start of the study;

2. no following the guidelines established by the nutrition professional.

• Minimum Eligible Age: 30 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Campus docent Sant Joan de Déu-Universitat de Barcelona

OTHER

Sponsor Role: lead

Responsible Party

Manuel Vicente Garnacho Castano

Principal investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Manuel V Garnacho-Castaño, PhD

Role: PRINCIPAL_INVESTIGATOR

Campus docent Sant Joan de Déu-Universitat de Barcelona

Locations

Campus Docent Sant Joan de Déu. Universitat de Barcelona

Sant Boi de Llobregat, Barcelona, Spain

Countries

Spain

Other Identifiers

CDSJD

Identifier Type: -

Identifier Source: org_study_id