Vascular and Neuro-inflammatory Effects of Endurance Exercise Training in African Americans

Not Applicable

Completed

• Conditions: Vascular Health; Autonomic Function
• Interventions: Behavioral: Endurance Exercise

• Registration Number: NCT01024634
• Lead Sponsor: University of Illinois at Urbana-Champaign

Brief Summary

The purpose of this study is to test the effects of endurance exercise training on arterial structure and function, and to examine potential mechanisms producing changes in arterial structure and function in young (18-35 years of age) African Americans when compared to Caucasians.

Detailed Description

African-Americans are at greater risk than Caucasians for developing hypertension, cardiovascular disease, stroke and renal disease. This is likely related to arterial dysfunction including greater arterial stiffness, and reduced microvascular reactivity of resistance arteries in African-Americans. In addition, African-Americans have higher levels of inflammatory markers, and a greater sympathoexcitatory response to various stressors. This imbalance between sympathetic and reduced parasympathetic activation may directly affect vascular function and potentiate a greater inflammatory response, further altering key structural and functional properties of the vascular wall. The overall aim of this proposal is to test the effects of endurance exercise training on arterial structure and function, and to examine potential mechanisms producing changes in arterial structure and function in young (18-35 years of age) African Americans when compared to Caucasians. We will examine these effects at rest and following a high intensity (maximal cycle ergometry) sympathoexcitation at both pre- and post-intervention time points, since sympathoexcitation may elucidate changes not evident at rest. Because African-Americans have higher levels of arterial stiffness, lower microvascular reactivity, greater responses to sympathoexcitation, greater levels of inflammatory markers and greater vasoconstrictive tone, we hypothesize that African-Americans will show differential responses to exercise training and benefit more compared to a matched group of Caucasians.

Study Timeline

• Study Start: 2009-09
• Study First Submitted: 2009-12-02
• Study First Submitted QC: 2009-12-02
• Study First Posted: 2009-12-03
• Primary Completion: 2011-07
• Status Verified: 2012-12
• Study Completion: 2012-12
• Last Update Submitted: 2012-12-14
• Last Update Posted: 2012-12-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 91

Inclusion Criteria

• Subjects in good health with no cardiovascular, metabolic, or inflammatory disease, who do not use cardiovascular medications or antioxidant vitamin supplementation, including use of anti-inflammatory (including aspirin) or steroidal substances in the past 2 months will be inlcuded

Exclusion Criteria

• Subjects who smoke, are severely obese (body mass index > 35 kg/m2), or who have hypertension (blood pressure >140/90mmHg), diabetes (fasting glucose >110mg/dl), hyperlipidemia, inflammatory disease (rheumatoid arthritis and systemic lupus erythematosus, etc) or diagnosed cardiovascular disease including, coronary heart disease, hypertension and cardiac arrhythmia or renal disease, will be excluded

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
African American Group	Endurance Exercise	A group of young African American males and females
Caucasian Group	Endurance Exercise	a group of young Caucasian men and women

Primary Outcome Measures

Name	Time	Method
Arterial function	Pre, following a 4 week control period and after 8 weeks of exercise intervention

Secondary Outcome Measures

Name	Time	Method
Autonomic function	Pre, following a 4 week control period and following 8 weeeks of an exercise intervention

Trial Locations

Locations (1)

Kinesiology and Community Health Department, University of Illinois at Urbana-Champaign; 🇺🇸 Urbana, Illinois, United States