Effects of Beetroot Juice Intake on Performance and Physiological Parameters

Nutrition, Healthy Clinical Trial

Official title:

Effects of Acute Beetroot Juice Intake on Performance, Maximal Oxygen Uptake, and Ventilatory Efficiency in Well-trained Master Rowers: A Randomized, Double-blinded Crossover Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT06073275
• Other study ID #: CDSJD
• Status: Completed
• Phase: N/A
• Start date: November 1, 2018
• Est. completion date: February 26, 2019

Study information

• Verified date: October 2023
• Source: Campus docent Sant Joan de Déu-Universitat de Barcelona
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: February 26, 2019
• Est. primary completion date: January 31, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 30 Years and older

Eligibility

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.

Related Conditions & MeSH terms

• Pulmonary Function

Intervention

Dietary Supplement:
• 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.
• 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.

Locations

Country	Name	City	State
Spain	Campus Docent Sant Joan de Déu. Universitat de Barcelona	Sant Boi De Llobregat	Barcelona

Sponsors (1)

Lead Sponsor	Collaborator
Campus docent Sant Joan de Déu-Universitat de Barcelona

Country where clinical trial is conducted

Spain, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Rowing performance: Time trial	minutes:seconds (mm:ss)	through study completion, an average of 3 weeks
Primary	Rowing performance: Mean Power output	Watts	through study completion, an average of 3 weeks
Primary	Rowing performance: meter per stroke	Meters	through study completion, an average of 3 weeks
Primary	Cardiorespiratory performance: absolute oxygen uptake	V?O2max (L/min)	through study completion, an average of 3 weeks
Primary	Cardiorespiratory performance: relative oxygen uptake	V?O2max (mL/kg/min)	through study completion, an average of 3 weeks
Primary	Cardiorespiratory performance: ventilatory efficiency	slope of Ventilation/Carbon dioxide production	through study completion, an average of 3 weeks
Primary	Metabolic performance: lactate	mmol/L	through study completion, an average of 3 weeks
Secondary	Cardiorespiratory performance: Maximum heart rate	beats/min	through study completion, an average of 3 weeks
Secondary	Cardiorespiratory performance: Mean heart rate	beats/min	through study completion, an average of 3 weeks
Secondary	Saturation	percentage	through study completion, an average of 3 weeks
Secondary	Cardiorespiratory performance: minute ventilation	minute ventilation in L/min	through study completion, an average of 3 weeks
Secondary	Scale of Perceived exertion ratio (RPE)	Scale from 0 to 10. 0 = rest; 10 = maximum effort	through study completion, an average of 3 weeks
Secondary	Rowing performance: strokes	Mean strokes per minute	through study completion, an average of 3 weeks