Clinical trial NCT01024634: Vascular and Neuro-inflammatory Effects of Endurance Exercise Training in African Americans
Official title: Vascular and Neuro-inflammatory Effects of Endurance Exercise Training in African Americans
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Vascular Health
Autonomic Function
Keywords: Arterial stiffness
Endothelial function
Autonomic function
Inflammation
Lead sponsor: University of Illinois at Urbana-Champaign
Sponsor class: OTHER
Collaborators: name: National Heart, Lung, and Blood Institute (NHLBI)
First posted: 2009-12-03
Enrollment: 91
Sex: ALL
Minimum age (years): 18
Maximum age (years): 35
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: PREVENTION

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.

Eligibility criteria: 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

Primary outcomes:
measure: Arterial function
timeFrame: Pre, following a 4 week control period and after 8 weeks of exercise intervention
Secondary outcomes:
measure: Autonomic function
timeFrame: Pre, following a 4 week control period and following 8 weeeks of an exercise intervention
Other outcomes:
Locations:
city: Urbana
country: United States
facility: Kinesiology and Community Health Department, University of Illinois at Urbana-Champaign
state: Illinois
Study officials:
affiliation: University of Illinois at Urbana-Champaign
name: Bo Fernhall, Ph.D.
role: PRINCIPAL_INVESTIGATOR
References: