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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT06045845
Other study ID # STUDY00150492
Secondary ID
Status Completed
Phase N/A
First received
Last updated
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
Health authority
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

Study Design


Related Conditions & MeSH terms


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.
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