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Effects of Beetroot Juice and Caffeinated Coffee on Exercise Performance in Recreationally Active Men

NCT07797062 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 16

Last updated 2026-09-01

No results posted yet for this study

Summary

The goal of this clinical trial was to evaluate how acute intake of beetroot juice, caffeinated coffee, and their combination affected aerobic and anaerobic exercise performance in healthy recreationally active men. The main questions were:

Did beetroot juice, caffeinated coffee, or their combination improve aerobic exercise performance? Did beetroot juice, caffeinated coffee, or their combination improve countermovement jump performance?

Researchers compared four conditions: control, caffeinated coffee, beetroot juice, and beetroot juice combined with caffeinated coffee. Each participant completed all four conditions in a randomized crossover design, with a 1-week washout period between sessions.

Participants:

Completed a familiarization session before the experimental sessions Consumed water only, caffeinated Turkish coffee, beetroot juice, or both beetroot juice and caffeinated coffee depending on the assigned condition Performed a countermovement jump test Performed a 20-m multistage shuttle run test Had heart rate and rating of perceived exertion assessed during exercise testing

Conditions

  • Exercise Performance

Interventions

DIETARY_SUPPLEMENT

Beetroot juice

Participants consumed 70 mL of concentrated beetroot juice providing 6.5 mmol of nitrate according to the manufacturer's specification. The beetroot juice was consumed approximately 2.5 hours before exercise testing.

OTHER

Caffeinated Turkish Coffee

Turkish coffee was individually prepared to provide an estimated caffeine dose of 4 mg/kg body mass. The caffeine dose was calculated using an estimated caffeine content of 17 mg/g of coffee. Approximately 14-20 g of coffee was prepared with 100 mL of water and consumed approximately 60 minutes before exercise testing.

OTHER

Water

During the control condition, participants received no experimental supplement and consumed water only before completing the standardized exercise testing protocol.

Sponsors & Collaborators

  • Acibadem University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-12-05
Primary Completion
2024-12-26
Completion
2024-12-26

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07797062 on ClinicalTrials.gov