Now Available for Public Comment: Notice of Proposed Rulemaking (NPRM) for FDAAA 801 and NIH Draft Reporting Policy for NIH-Funded Trials

Physical Training and Blood Pressure in High Risk Youths

This study has been completed.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI) Identifier:
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: April 2002

To determine the effects of physical activity on blood pressure and body fat in children varying in ethnicity, gender, and health status.

Cardiovascular Diseases
Heart Diseases

Study Type: Observational

Resource links provided by NLM:

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: January 1995
Estimated Study Completion Date: December 1997
Detailed Description:


There were two specific aims. The first was to test the hypothesis that controlled physical training (PT) reduced blood pressure, at rest and in reaction to forehead cold and exercise stressors, in 8-9 year olds who were high in both blood pressure and body fatness. Subjects were divided equally on gender and blood pressure and body fatness. Subjects were divided equally on gender and ethnicity (black/white). Both resting and reactive blood pressure were correlated with left ventricular mass and were predictive of future essential hypertension. The underlying hemodynamic regulators of blood pressure, cardiac output and the total peripheral resistance, were measured with impedance cardiography to explore hemodynamic mechanisms through which training had a favorable influence on blood pressure and left ventricular mass.

The second aim tested the hypothesis that physical training reduced percent body fat, as measured with dual energy x-ray absorptiometry (DEXA). Children above the 70th percentile in both blood pressure and fatness were randomly assigned, within ethnicity and gender, to a physical training or waiting list control group. After the physical training group underwent four months of training, all subjects were retested and these data were used to test the primary hypotheses. The initial control subjects then performed four months of physical training, after which they were retested. The data from this second phase were added to the data of the initial physical training group to explore interactions of training with gender and ethnicity. The initial physical training group was brought back four months after cessation of training to see if the changes elicited by the training were reversible. To document the stimulation provided by the training, heart rate was monitored during training sessions. To observe the time course of changes between the full lab testing sessions, skinfolds and resting blood pressure were measured monthly. Diet and free living physical activity were assessed to help explain changes in body composition. Aerobic fitness was measured with treadmill tests of maximal oxygen consumption.


Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

No eligibility criteria

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

No Contacts or Locations Provided
  More Information

Publications: Identifier: NCT00005695     History of Changes
Other Study ID Numbers: 4258
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases
Vascular Diseases processed this record on November 25, 2014