Effects of Beet Juice and Diet in Female Rowers

NCT06045845 | Completed

• 1 other identifier: STUDY00150492
• Study Type: interventional
• Target: 15
• Locations: 1 country
• Sites: 1

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.

Conditions

Dietary Habits; Nitrates; Exercise

Keywords

dietary nitrate; beetroot juice; sex differences; exercise; performance; muscle

Outcome Measures

Primary Outcomes (8)

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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.

Study Arms (2)

Standard Beet Juice First

EXPERIMENTAL

First Test: Beet Juice / Second Test: Placebo

Dietary Supplement: Beet Juice; Dietary Supplement: Placebo

Placebo Beet Juice First

EXPERIMENTAL

First Test: Placebo / Second Test: Beet Juice

Dietary Supplement: Beet Juice; Dietary Supplement: Placebo

Interventions

Beet Juice DIETARY_SUPPLEMENT

70 milliliter (70mL) standard Beet Juice (Beet It Sport Shot) consumed 2.5 hours before exercise test

Placebo Beet Juice First; Standard Beet Juice First

Placebo DIETARY_SUPPLEMENT

70mL placebo Beet Juice (Beet It Sport Shot with nitrate removed) consumed 2.5 hours before exercise test

Placebo Beet Juice First; Standard Beet Juice First

Eligibility Criteria

• Age: 18 Years - 30 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Healthy
• Athletes currently on the university's rowing team

You may not qualify if:

• 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

Sponsors & Collaborators

• University of Kansas Medical Center: lead

Study Sites (1)

University of Kansas Rowing Boathouse

Lawrence, Kansas, 66044, United States

Location

MeSH Terms

Conditions

Feeding Behavior; Motor Activity

Condition Hierarchy (Ancestors)

Behavior, Animal; Behavior

Study Officials

• Jessica A Provost, MS

  University of Kansas Medical Center

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: SUPPORTIVE CARE
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator, Doctoral Candidate, Graduate Teaching Assistant

Study Record Dates

• First Submitted: September 13, 2023
• First Posted: September 21, 2023
• Study Start: October 3, 2023
• Primary Completion: November 17, 2023
• Study Completion: December 31, 2023
• Last Updated: February 2, 2024

Record last verified: 2024-01

Data Sharing

• IPD Sharing: Will not share

Locations

US (1)