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Optimizing Body Composition for Function in Older Adults

This study has been completed.
Information provided by:
Wake Forest Baptist Health Identifier:
First received: April 13, 2006
Last updated: April 18, 2007
Last verified: April 2007

The purpose of this pilot study is to compare two strategies intended to improve the health of overweight older adults by improving body composition. One strategy, resistance training, is designed to preserve skeletal muscle mass. The other strategy, the use of a PPAR-γ agonist, is designed to enhance the loss of fat from visceral and skeletal depots. These strategies will be used in conjunction with a hypocaloric diet and will be compared to a hypocaloric diet alone to determine if either of these strategies are superior in reducing visceral fat and preserving muscle mass.

Condition Intervention Phase
Overweight With Indications for Weight Loss
Drug: Pioglitazone
Behavioral: Resistance exercise training to maximize muscle power
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Single Blind
Primary Purpose: Treatment
Official Title: Optimizing Body Composition for Function in Older Adults (OPTIMA) – A Pepper Pilot Study

Resource links provided by NLM:

Further study details as provided by Wake Forest Baptist Health:

Primary Outcome Measures:
  • Appendicular non-bone lean mass
  • Abdominal visceral fat area

Secondary Outcome Measures:
  • Waist circumference
  • Intramyocellular lipid accumulation
  • Blood pressure
  • Fasting Glucose
  • Serum lipids

Estimated Enrollment: 88
Study Start Date: April 2006
Study Completion Date: April 2007
Detailed Description:

In this pilot we propose to recruit 88 older (65 - 79 yrs) men (n=48) and women (n=40) at risk for disability and with indications for weight loss according to NIH guidelines. All will be enrolled in a dietary intervention designed to generate a caloric deficit of 500 kcal/day for a 4 month period. All will receive supplemental vitamin D and calcium. These participants will be randomized into one of 4 groups:

Group 1 – Hypocaloric diet (and placebo) Group 2 – Hypocaloric diet and resistance training designed to maximize muscular power (and placebo) Group 3 – Hypocaloric diet and a PPAR- γ agonist (pioglitazone/Actos™) Group 4 – Hypocaloric diet and resistance training and pioglitazone/Actos™

The specific aims of the pilot are:

  1. In both men and women, to determine whether randomization to resistance exercise is associated with an increased retention of appendicular non-bone lean mass compared to those not undergoing power training.
  2. In both men and women, to determine whether randomization to the pioglitazone group is associated with an increased loss of visceral adiposity relative to randomization to the non-pioglitazone group.
  3. Assess the feasibility of the recruitment, assessment and intervention strategies
  4. To estimate adherence to the weight loss, exercise training, and drug interventions;
  5. In this population, to determine measurement characteristics of the functional outcomes that will be considered as primary end-points of the larger study.
  6. To obtain pilot data on a subset of participants to determine the feasibility, acceptability and measurement characteristics of muscle samples (biopsies) to quantify intramyocellular lipid in this study population.

Ages Eligible for Study:   65 Years to 79 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Weight Stable, Indication for weight loss per NIH guidelines, Performance on the short physical performance battery score 3-10

Exclusion Criteria:

  • Diabetes, weight > 136 kg, Medical condition that limits exercise participation, Congestive heart failure, abnormal kidney function, higher ALT than normal, currently involved in a weight loss or exercise program, current smoking, alcohol or drug abuse, taking anti-inflammatory steroids, taking protein supplements, taking PPAR-gamma agonist, edema, anemia
  Contacts and Locations
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Please refer to this study by its identifier: NCT00315146

United States, North Carolina
Sticht Center on Aging, Wake Forest University Baptist Medical Center
Winston-Salem, North Carolina, United States, 27157
Sponsors and Collaborators
Wake Forest Baptist Health
Principal Investigator: Stephen B Kritchevsky, PhD Sticht Center on Aging, Wake Forest University School of Medicine
  More Information

No publications provided Identifier: NCT00315146     History of Changes
Other Study ID Numbers: P30-AG021332-2006
Study First Received: April 13, 2006
Last Updated: April 18, 2007
Health Authority: United States: Institutional Review Board

Keywords provided by Wake Forest Baptist Health:
Body Composition
Weight loss trials
Intervention studies

Additional relevant MeSH terms:
Weight Loss
Body Weight
Body Weight Changes
Signs and Symptoms
Hypoglycemic Agents
Pharmacologic Actions
Physiological Effects of Drugs processed this record on November 25, 2014