Muscle Lipid and Insulin Resistance in the Elderly (MIRA)
|ClinicalTrials.gov Identifier: NCT00765505|
Recruitment Status : Completed
First Posted : October 3, 2008
Last Update Posted : February 6, 2018
|Condition or disease||Intervention/treatment|
|Obesity||Behavioral: Exercise Group Behavioral: Health Education Group|
Hypothesis and Specific Aims:
To determine whether aerobic exercise improves both skeletal muscle fat distribution and insulin sensitivity of older men and women. We will test two hypotheses.
i. Physical exercise in older adults will decrease the amount of fat interspersed within muscle, specifically the fat between muscle groups (intermuscular adipose tissue) as well as decrease specific lipid metabolites within muscle cells, compared to controls.
ii. Exercise-induced improvements in insulin sensitivity of older men and women will be related to the changes in muscle fat content independent of changes in total body fat or visceral abdominal adipose tissue.
To determine whether increased capacity for oxidative fatty acid metabolism within muscle results in improved insulin sensitivity in older adults. We will test two hypotheses.
i. Exercise training will increase the capacity of muscle to oxidize fatty acids assessed both in vitro and in vivo.
ii. Improved capacity for oxidative fatty acid metabolism will predict improvements in insulin sensitivity.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||92 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Muscle Lipid and Insulin Resistance in the Elderly|
|Study Start Date :||July 2004|
|Primary Completion Date :||December 31, 2017|
|Study Completion Date :||December 31, 2017|
Behavioral: Exercise Group
Sixteen week intervention where subjects will be progressed to four days per week for 45 minutes per session, 180 minutes minimum per week, of moderate intensity supervised exercise.
|Experimental: Health Education Group||
Behavioral: Health Education Group
Sixteen week intervention. This group will not receive specific exercise education or prescription but will be asked to participate in biweekly health education sessions
- Insulin sensitivity and muscle fat content will be measured at the beginning and the end of the intervention to determine the effects of exercise on these measures. [ Time Frame: 16 weeks ]
- Examine if exercise-induced improvements in insulin sensitivity are similar in normal weight and in obese older subjects. [ Time Frame: 16 weeks ]
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00765505
|United States, Pennsylvania|
|University of Pittsburgh|
|Pittsburgh, Pennsylvania, United States, 15213|
|Principal Investigator:||Bret H. Goodpaster, PhD||University of Pittsburgh|