Effects of Beetroot Juice Intake on Performance and Physiological Parameters

NCT06073275 | Completed

• 1 other identifier: CDSJD
• Study Type: interventional
• Target: 10
• Locations: 1 country
• Sites: 1

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.

Conditions

Pulmonary Function; Nutrition, Healthy

Keywords

Cardiorespiratory performance; Time trial performance; Beetroot juice; Master rowers; well-trained

Outcome Measures

Primary Outcomes (7)

• Rowing performance: Time trial

  minutes:seconds (mm:ss)

  through study completion, an average of 3 weeks

• Rowing performance: Mean Power output

  Watts

  through study completion, an average of 3 weeks

• Rowing performance: meter per stroke

  Meters

  through study completion, an average of 3 weeks

• Cardiorespiratory performance: absolute oxygen uptake

  V̇O2max (L/min)

  through study completion, an average of 3 weeks

• Cardiorespiratory performance: relative oxygen uptake

  V̇O2max (mL/kg/min)

  through study completion, an average of 3 weeks

• Cardiorespiratory performance: ventilatory efficiency

  slope of Ventilation/Carbon dioxide production

  through study completion, an average of 3 weeks

• Metabolic performance: lactate

  mmol/L

  through study completion, an average of 3 weeks

Secondary Outcomes (6)

• Cardiorespiratory performance: Maximum heart rate

  through study completion, an average of 3 weeks

• Cardiorespiratory performance: Mean heart rate

  through study completion, an average of 3 weeks

• Saturation

  through study completion, an average of 3 weeks

• Cardiorespiratory performance: minute ventilation

  through study completion, an average of 3 weeks

• Scale of Perceived exertion ratio (RPE)

  through study completion, an average of 3 weeks

Study Arms (2)

Beetroot juice intake

EXPERIMENTAL

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).

Dietary Supplement: Beetroot juice ingestion

Placebo intake

PLACEBO COMPARATOR

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

Dietary Supplement: Placebo ingestion

Interventions

Beetroot juice ingestion 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.

Beetroot juice intake

Placebo ingestion 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.

Placebo intake

Eligibility Criteria

• Age: 30 Years+
• Gender Eligibility Details: well-trained male master rowers
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• national and/or international level;
• without cardiovascular, respiratory, metabolic, neurological or orthopedic disorders that may affect the performance of the rowing ergometer test;
• no consumption of drugs or medicines;
• no smoking;
• Informed consent to participate in the study signed by all rowers

You may not qualify if:

• Ingestion of nutritional supplements taken in the three months prior to the start of the study;
• no following the guidelines established by the nutrition professional.

Sponsors & Collaborators

• Campus docent Sant Joan de Déu-Universitat de Barcelona: lead

Study Sites (1)

Campus Docent Sant Joan de Déu. Universitat de Barcelona

Sant Boi de Llobregat, Barcelona, 08830, Spain

Location

Study Officials

• Manuel V Garnacho-Castaño, PhD

  Campus docent Sant Joan de Déu-Universitat de Barcelona

  PRINCIPAL INVESTIGATOR

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: Principal investigator

Model Details: This study was a randomized, double-blind, crossover design

Study Record Dates

• First Submitted: September 25, 2023
• First Posted: October 10, 2023
• Study Start: November 1, 2018
• Primary Completion: January 31, 2019
• Study Completion: February 26, 2019
• Last Updated: October 10, 2023

Record last verified: 2023-10

Data Sharing

• IPD Sharing: Will not share

Locations

ES (1)