Influence of Endothelial Function on Central and Peripheral Causes Of Exercise Impairment in Type 2 Diabetes (InsITE)
|ClinicalTrials.gov Identifier: NCT00786019|
Recruitment Status : Completed
First Posted : November 5, 2008
Last Update Posted : April 12, 2016
|Condition or disease||Intervention/treatment||Phase|
|Type 2 Diabetes||Behavioral: Exercise program Drug: Ascorbic Acid (Vitamin C)||Not Applicable|
The investigators have found that persons with type 2 diabetes have an impaired ability to perform exercise even without clinically apparent complications. The reasons for this marked abnormality are unknown but are important as the decreased ability to exercise could contribute to the decreased expenditure of physical activity frequently observed in this population and may potentially constitute an early marker of cardiovascular disease.
The investigators wish to evaluate the effects of impaired blood flow regulation on exercise capacity and whether the effects are more important in the heart or in the skeletal muscle tissue during exercise. In addition, the investigators are determining whether correcting these abnormalities by two methods of improving blood flow regulation (acutely infusing Vitamin C or three months of chronic exercise training) leads to improved blood flow regulation, improved heart and skeletal muscle tissue function and hence to better exercise capacity in person with type 2 diabetes. This information will provide a more mechanistic understanding of causes of abnormal exercise responses observed in person with type 2 diabetes as well as whether and to what degree responses are modifiable. Interventions that reverse the exercise defect may facilitate patient adherence to prescribed physical activity programs and potentially decrease cardiovascular mortality in this large segment of the population.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||98 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Primary Purpose:||Health Services Research|
|Official Title:||Influence Of Endothelial Function On Central and Peripheral Causes Of Exercise Impairment In Type 2 Diabetes|
|Study Start Date :||May 2008|
|Actual Primary Completion Date :||October 2011|
|Actual Study Completion Date :||October 2011|
Experimental: Ascorbic acid
All study subjects have ascorbic acid infusion during one exercise visit as well as a three month exercise training intervention.
Behavioral: Exercise program
Three month exercise program located at the Anschutz Medical Campus at I-225 and Colfax. The program runs three times per week for about an hour each session. Gym is open Monday - Saturday during specific hours (morning, noon, evening).
Other Name: Exercise TrainingDrug: Ascorbic Acid (Vitamin C)
During one exercise study visit, 0.06 g Vit C per kg fat-free mass per 100 ml of normal saline administered; Subjects will receive a bolus of 100mL Vit C solution given at 5ml/min over 20minutes followed by a "drip-infusion" given at 1.7ml/min.
- Characterize the purported cardiac dysfunction [ Time Frame: 7 months ]Characterize the purported cardiac dysfunction during exercise in people with type 2 diabetes mellitus (T2DM).
- Evaluate potential changes in cardiac function following 2 interventions [ Time Frame: 7 months ]Evaluate potential changes in cardiac function following 2 interventions: Three months exercise training and acute vitamin C administration.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00786019
|United States, Colorado|
|University of Colorado Denver|
|Aurora, Colorado, United States, 80045|
|Principal Investigator:||Judith G Regensteiner, PhD||University of Colorado, Denver|