Clinical trial NCT06045845: Effects of Beet Juice and Diet in Female Rowers
Official title: The Effects of Beetroot Supplementation and Habitual Dietary Nitrate Intake on Exercise Performance in Collegiate Female Rowing Athletes
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Dietary Habits
Nitrates
Exercise
Keywords: dietary nitrate
beetroot juice
sex differences
exercise
performance
muscle
Lead sponsor: University of Kansas Medical Center
Sponsor class: OTHER
First posted: 2023-09-21
Enrollment: 15
Sex: FEMALE
Minimum age (years): 18
Maximum age (years): 30
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: SUPPORTIVE_CARE

Brief 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.

Detailed 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.

Eligibility criteria: 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

Primary outcomes:
measure: Rowing Test Time
timeFrame: Recorded immediately upon completion of each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Rowing Test Perceived Exertion
timeFrame: Recorded immediately upon completion of each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Rowing Test Peak Heart Rate
timeFrame: Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Rowing Test Average Heart Rate
timeFrame: Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Rowing Test Peak Power Output
timeFrame: Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Rowing Test Average Power Output
timeFrame: Recorded during each of the 4 500-meter intervals during rowing time trial tests on day 7 and day 14.
measure: Dietary Nitrate Habitual Consumption Amount
timeFrame: Collected after each rowing time trial test for the preceding 24-hour period (day 6 and day 13). Means determined in post-testing analysis.
measure: Dietary Nitrate Habitual Consumption Category
timeFrame: 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.
Secondary outcomes:
Other outcomes:
Locations:
city: Lawrence
country: United States
facility: University of Kansas Rowing Boathouse
state: Kansas
Study officials:
affiliation: University of Kansas Medical Center
name: Jessica A Provost, MS
role: PRINCIPAL_INVESTIGATOR
References: