Aging Clinical Trial - Effects of Age & Exercise on Blood Pressure

Status Recruiting

Clinical Trial Summary

The purpose of this study is to investigate the effects of age, exercise and cardiovascular disease on blood pressure.

Clinical Trial Description

This study is being done to find out how age, activity level, and the presence of heart disease affect the way the body controls blood pressure. A total of 80 individuals will be recruited for the study, and will consist of two groups: sedentary healthy individuals and those with coronary artery disease (CAD). Each group will undergo screening tests, including history, questionnaires, physical exam, lab tests, treadmill exercise tolerance test, and maximal exercise test. These screening tests will be repeated at 3 months and 6 months.

The study involves 20 visits over a 6-month period. An exercise-training program will be designed for the individual's fitness level. During the first month, the individual will be supervised while exercising at Spaulding Rehabilitation Hospital, but after that may choose to exercise at home or in a fitness center. These exercise sessions will take place 3-5 times per week for 15-40 minutes per session based on the individual's exercise program, increasing to 4-6 times per week for 30-60 minutes per session after the first month. Participants will be required to visit Spaulding Rehabilitation Hospital a minimum of once every two weeks so that information can be collected from a heart rate monitor.

Testing is done at the beginning and end of the exercise-training intervention period to determine what effect the intervention has had on the individual's blood pressure regulation. This testing consists of 2 sequential study days. During the first day's testing, which will last about 2 hours, the participant will receive 8 low doses of atropine to alter vagal effects. On the second day, which will take about 4 hours, the participant will receive sodium nitroprusside, phenylephrine, and low-dose atropine while sympathetic nervous activity is recorded. Differences in blood pressure regulation pre- and post-training will be studied. ;

Study Design

Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00319397
Study type	Observational
Source	National Institute on Aging (NIA)
Contact	Glen Picard, MA
Phone	617-573-2786
Email	apicard@partners.org
Status	Recruiting
Phase	N/A
Start date	April 2004
Completion date	March 2007

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Effects of Age and Exercise on Blood Pressure Regulation

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms