Effects of Beet Juice and Diet in Female Rowers

Exercise Clinical Trial

Official title:

The Effects of Beetroot Supplementation and Habitual Dietary Nitrate Intake on Exercise Performance in Collegiate Female Rowing Athletes

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT06045845
• Other study ID #: STUDY00150492
• Status: Completed
• Phase: N/A
• Start date: October 3, 2023
• Est. completion date: December 31, 2023

Study information

• Verified date: January 2024
• Source: University of Kansas Medical Center
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to determine the effects of nitrate-rich beetroot juice supplementation on exercise performance in female rowers when accounting for habitual vegetable nitrate consumption.

Description:

The objective is to use a stratified block randomization, double-blind crossover trial to test rowing ergometer exercise performance after drinking a beetroot juice supplement and compare it to the same test after consuming a placebo (a nitrate-free version of the beetroot juice supplement) in a convenience sample of athletes from a single Division 1-A collegiate women's rowing team.

Before testing, the participants' habitual vegetable nitrate consumption will be assessed from their report of foods consumed in the past 24 hours. Estimates of dietary nitrate intake will be calculated from the quantity of vegetables consumed and used to determine whether dietary nitrate intake influences the efficacy of the beetroot juice supplement.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 15
• Est. completion date: December 31, 2023
• Est. primary completion date: November 17, 2023
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years to 30 Years

Eligibility

Inclusion Criteria:

• Healthy

• Athletes currently on the university's rowing team

Exclusion Criteria:

• Injuries or medical conditions that prevent participation in their team's rowing training program

• Diagnosis of stage 2 iron deficiency

• Unable to consume beet juice for any reason

Related Conditions & MeSH terms

• Dietary Habits
• Exercise
• Nitrates

Intervention

Dietary Supplement:
• Beet Juice
70 milliliter (70mL) standard Beet Juice (Beet It Sport Shot) consumed 2.5 hours before exercise test
• Placebo
70mL placebo Beet Juice (Beet It Sport Shot with nitrate removed) consumed 2.5 hours before exercise test

Locations

Country	Name	City	State
United States	University of Kansas Rowing Boathouse	Lawrence	Kansas

Sponsors (1)

Lead Sponsor	Collaborator
University of Kansas Medical Center

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Rowing Test Time	Time (seconds) to complete 500-meter rowing time trial tests.	Recorded immediately upon completion of each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Rowing Test Perceived Exertion	Rating of perceived exertion reported by participant during rowing time trial tests. The Borg Scale is used, in which participants choose a number between 6 ("Rest") and 20 ("Maximal Effort") to indicate their perceived exertion at the completion of each 500-meter segment.	Recorded immediately upon completion of each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Rowing Test Peak Heart Rate	Maximum heart rate (beats per minute) during 500-meter rowing time trial tests. The Maximum is the single highest heart rate recorded during that 500-meter interval.	Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Rowing Test Average Heart Rate	Mean heart rate (beets per minute) during 500-meter rowing time trial tests.	Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Rowing Test Peak Power Output	Maximum power (watts) during 500-meter rowing time trial tests	Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Rowing Test Average Power Output	Mean power (watts) during 500-meter rowing time trial tests	Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
Primary	Dietary Nitrate Habitual Consumption Amount	Mean vegetable nitrate consumption (mg/day) from two different self-administered 24-hour dietary recalls (ASA24).	Collected after each rowing time trial test for the preceding 24-hour period (day 6 and day 13). Means determined in post-testing analysis.
Primary	Dietary Nitrate Habitual Consumption Category	Categorization of Dietary Nitrate Habitual Consumption Amount. The median of all participants' Amounts will be determined to categorize each participant as "high" (above median) or "low (below median).	Collected after each rowing time trial test for the preceding 24-hour period (day 6 and day 13). Median and categories determined in post-testing analysis.