CALERIE (Washington University): Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy

This study has been completed.
Sponsor:
Information provided by:
National Institute on Aging (NIA)
ClinicalTrials.gov Identifier:
NCT00099138
First received: December 8, 2004
Last updated: December 9, 2009
Last verified: February 2006
  Purpose

This study is one of three CALERIE trials that test the hypothesis that a reduced calorie, nutritionally sound diet increases the length of life and prevents some age-related chronic diseases such as cancer, diabetes, and cardiovascular disease. The three sites that are participating in the CALERIE trial represent a diversity of subject populations and interventional strategies.


Condition Intervention Phase
Aging
Behavioral: Caloric Restriction (CR)
Behavioral: Exercise
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind
Primary Purpose: Prevention
Official Title: Caloric Restriction and Aging in Humans

Resource links provided by NLM:


Further study details as provided by National Institute on Aging (NIA):

Estimated Enrollment: 48
Study Start Date: March 2002
Study Completion Date: February 2006
Primary Completion Date: February 2006 (Final data collection date for primary outcome measure)
Detailed Description:

Animal studies suggest that caloric restriction (CR), or consuming fewer calories, increases life span, and also protects against some aging-related disease processes such as artherosclerosis and type II diabetes. However, it appears that simply burning more calories through physical activity does not increase life span by itself. It is not known how CR affects humans, but based on this evidence it appears that the reduced total intake and metabolism of food is the main factor, rather than increased exercise alone.

To test this, volunteers will be placed on a program of either 20% caloric restriction or 20% increase of energy expenditure by exercise, or in a control group to be instructed in healthy living. All will be evaluated on a number of potential markers of aging, on body composition, and on risk factors for artherosclerosis and diabetes.

Participation in the study will last for 12 months. The Diet group will receive individual instruction from a registered dietician. The Exercise group will be given an individualized exercise program created by a personal trainer. The Healthy Lifestyle group will be given information on how to make healthier choices; both diet and activity will be discussed. All participants will be measured every two weeks, and will keep daily food and activity logs. All will be seen by a physician and will have lab tests done before beginning the study, at 1 month, and then 3 month intervals.

  Eligibility

Ages Eligible for Study:   50 Years to 60 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Age 50 to 60
  • Women must be post-menopausal
  • Normal weight to moderately overweight, (Body Mass Index [BMI] between 23 - 30)
  • In good health, free of major chronic diseases or conditions
  • Well motivated
  • Reliable

Exclusion Criteria:

  • Major chronic disease or condition that would interfere with exercise or caloric restriction (such as diabetes, coronary artery disease, significant obstructive airway disease, stroke, resting blood pressure over 170 mmHg systolic and/or 100 mmHg diastolic, history or evidence of malignancy, orthopedic or musculoskeletal problems)
  • Hormone replacement therapy (DHEA, estrogen, thyroid, testosterone)
  • Regular exercise twice or more per week
  • Smoking
  • Alcoholism
  • Frequent travel
  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.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00099138

Locations
United States, Missouri
Washington University in St. Louis, School of Medicine
St. Louis, Missouri, United States, 63110
Sponsors and Collaborators
Investigators
Principal Investigator: John O. Holloszy, MD Washington University in St. Louis, School of Medicine
  More Information

Additional Information:
Publications:
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
ClinicalTrials.gov Identifier: NCT00099138     History of Changes
Other Study ID Numbers: AG0012, 3U01AG020487
Study First Received: December 8, 2004
Last Updated: December 9, 2009
Health Authority: United States: Federal Government

Keywords provided by National Institute on Aging (NIA):
Diet
Caloric Restriction
Exercise
Energy Metabolism
Primary Aging
Secondary Aging

ClinicalTrials.gov processed this record on July 23, 2014