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Effects of Beetroot Extract on Blood Pressure and Exercise in Hypertensive Older Women

NCT07444138 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2026-03-02

No results posted yet for this study

Summary

The goal of this clinical trial is to learn about the acute effects of beetroot extract in older women with high blood pressure. The main questions it aims to answer are:

Does beetroot extract affect blood pressure during exercise? Does it change oxygen levels in the muscles? Participants will take a beetroot supplement and perform an aerobic exercise session to check how their bodies respond.

Conditions

Interventions

DIETARY_SUPPLEMENT

Beetroot Extract (Nitrate-rich)

Participants will ingest 2 capsules of a standardized beetroot extract (Berkeley Life Nitric Oxide Foundation). Each dose provides approximately 314 mg of dietary nitrate.

DIETARY_SUPPLEMENT

Placebo

Capsules identical in appearance, color, and size to the experimental supplement, but containing an inert substance (starch). This intervention is used to maintain the double-blind design of the study.

BEHAVIORAL

Exercise

Participants will perform a single aerobic exercise session on a treadmill. The protocol consists of a 7-minute warm-up followed by 30 minutes of continuous exercise at an intensity corresponding to 60-80% of maximum heart rate (HRmax), estimated using Tanaka's formula (208 - 0.7 \* age). Rate of Perceived Exertion (RPE) will be monitored periodically using the Borg scale (6-20).

OTHER

Rest (Control Condition)

Participants will remain seated for 30 minutes (matching the exercise session duration). During this time, a researcher will administer a Food Frequency Questionnaire (FFQ) in an interview format. This activity serves to assess dietary habits and simulates a routine, low-exertion daily activity (similar to a conversation), acting as a time-matched control for the exercise session.

Sponsors & Collaborators

  • São Paulo State University

    lead OTHER

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
60 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-10-08
Primary Completion
2026-06-30
Completion
2026-07-31

Countries

  • Brazil

Study Locations

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Entities

Diseases

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 NCT07444138 on ClinicalTrials.gov