Dietary Sodium, Oxidative Stress, and Pulsatile Hemodynamics

NCT ID: NCT04233957

Last Updated: 2023-11-29

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

50 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-01-01

Study Completion Date

2024-12-31

Brief Summary

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High sodium diets impair vascular function, which may influence the work of the heart. This investigation is designed to determine if this change in vascular function results in a greater workload in the heart and if people who regularly exercise are protected from these effects.

Detailed Description

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Excess dietary sodium is associated with cardiac hypertrophy independent of changes in blood pressure. Importantly, increased arterial pulsatile load predicts left ventricular hypertrophy, and thus presents a potential mechanism through which high dietary sodium augments cardiovascular disease risk.

While high sodium diets impair vascular function via an increase in oxidative stress, how high sodium influences central pulsatile hemodynamics is not known. This project aims to a) determine how impaired vascular function affects pulsatile hemodynamics and thus influences the work of the heart during periods of high sodium consumption and b) examine whether regular aerobic exercise and/or fitness protects against the deleterious effects of excess sodium.

Conditions

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Sodium Excess

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

PREVENTION

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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High Sodium

Consumption of an extra 3900 mg of dietary sodium per day.

Group Type EXPERIMENTAL

High Sodium

Intervention Type DIETARY_SUPPLEMENT

10 days of 3900 mg of sodium/day in excess of normal dietary intake delivered via enteric capsules filled with table salt.

Placebo

Control Condition

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

10 days of enteric capsules filled with dextrose.

Interventions

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High Sodium

10 days of 3900 mg of sodium/day in excess of normal dietary intake delivered via enteric capsules filled with table salt.

Intervention Type DIETARY_SUPPLEMENT

Placebo

10 days of enteric capsules filled with dextrose.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Healthy individuals (age 21-45) who are either sedentary (1 or less days of exercise per week during past year) or habitually active (4 or more days of aerobic exercise per week for a minimum of 1 year)

Exclusion Criteria

* Body mass index \<18 or \>35
* Systolic blood pressure ≥140 mmHg and/or diastolic blood pressure ≥90
* Blood donation within past 8 weeks,
* Glucose 6 phosphate dehydrogenase (G6PD) deficiency
* A history of cancer, diabetes, or any other chronic disease
* A history of any heart disease
* A history of hormone therapy
* Use of nicotine products
* Pregnancy
* Nursing mothers
* Participation in regular physical activity greater than 1 day/week- but less than 4 days/week
Minimum Eligible Age

21 Years

Maximum Eligible Age

45 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Delaware

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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David G Edwards, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Delaware

Locations

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Department of Kinesiology and Applied Physiology, University of Delaware

Newark, Delaware, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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David G Edwards, PhD

Role: CONTACT

302-831-3363

Jordan C Patik, PhD

Role: CONTACT

512-820-6387

Facility Contacts

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David Edwards, PhD

Role: primary

Jordan Patik, PhD

Role: backup

Other Identifiers

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1452626

Identifier Type: -

Identifier Source: org_study_id