- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01890876
Altitude, Exercise and Glucose Metabolism in Pre-diabetic Men
Altitude-dependent Effects of Concentric and Eccentric Exercise on Glucose Metabolism in Pre-diabetic Men
Concentric (CE) and eccentric (EE) exercises may differently affect glucose metabolism which may be additionally modified when exercises are performed in hypoxia, e.g. at moderate (1500 - 2500 m) or high (2500 - 3500 m) altitudes. However, data on the effects of glucose metabolism due to CE and EE in hypoxia are scarce but would be of utmost importance considering the increasing number of persons suffering from impaired glucose tolerance or diabetes and the unique opportunities provided by the mountainous regions of the Alps to perform CE (e.g. uphill hiking) and EE (downhill hiking, downhill skiing) at altitude between 1500 - 3500 m. Metabolic responses to exercise may be largely mediated by interleukin 6 (IL-6), which is predominantly derived from the contracting limbs and may support the maintenance of metabolic homeostasis during exercise. In addition, IL-6 is elevated with acute and chronic altitude exposure at least partly mediated via adrenergic stimulation. Thus, the type of exercise as well as hypoxia may contribute to IL-6 elevations and differences in serum IL-6 concentrations might help to explain distinctions between responses of glucose metabolism to CE and EE at low and moderate to high altitude.
32 male subjects suffering from pre-diabetes will be randomly assigned to a downhill (EE) or uphill (CE) walking group performing 9 sessions at low altitude (860 - 1360 m) and 9 sessions at moderate to high altitude (2000 - 2500 m). Between normoxic and hypoxic condition will be a break of approximately 12 month. Measurements of glucose metabolism, IL-6 plasma concentration will be performed pre, mid (day 5) and post intervention. Moreover anthropometric, strength and exercise capacity characteristics will be performed pre and post intervention.
We hypothesize that EE in hypoxia is more effective in the modulation of glycemic control in pre-diabetic men than CE in hypoxia as well as EE and CE in normoxia. It is suggested that effects on glucose metabolism are associated with changes in plasma IL-6 concentrations. EE in hypoxia is expected to result in a more persistent rise of plasma IL-6 concentration than CE in hypoxia and in normoxia and to a more pronounced rise in plasma IL-6 than EE in normoxia.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
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Innsbruck, Austria, 6020
- Department of Sport Science, Medical Section, University of Innsbruck
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Pre-diabetes
- male
- age 50-65 years
Exclusion Criteria:
- smoking
- BMI > 30 kg/m2
- diseases not compatible with intervention
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Low altitude
Walking uphill Walking downhill
|
ascending about 500 m
descending about 500 m
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Active Comparator: High altitude
Walking uphill Walking downhill
|
ascending about 500 m
descending about 500 m
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Glucose tolerance
Time Frame: 18 months
|
18 months
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Myokines
Time Frame: 18 months
|
18 months
|
Cardiovascular fitness
Time Frame: 18 months
|
18 months
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Martin Burtscher, Professor, department of sport science, medical section, university innsbruck
Publications and helpful links
General Publications
- Duennwald T, Gatterer H, Groop PH, Burtscher M, Bernardi L. Effects of a single bout of interval hypoxia on cardiorespiratory control and blood glucose in patients with type 2 diabetes. Diabetes Care. 2013 Aug;36(8):2183-9. doi: 10.2337/dc12-2113. Epub 2013 Mar 27.
- Drexel H, Saely CH, Langer P, Loruenser G, Marte T, Risch L, Hoefle G, Aczel S. Metabolic and anti-inflammatory benefits of eccentric endurance exercise - a pilot study. Eur J Clin Invest. 2008 Apr;38(4):218-26. doi: 10.1111/j.1365-2362.2008.01937.x.
- Burtscher M, Gatterer H, Kunczicky H, Brandstatter E, Ulmer H. Supervised exercise in patients with impaired fasting glucose: impact on exercise capacity. Clin J Sport Med. 2009 Sep;19(5):394-8. doi: 10.1097/JSM.0b013e3181b8b6dc.
- Philippe M, Junker G, Gatterer H, Melmer A, Burtscher M. Acute effects of concentric and eccentric exercise matched for energy expenditure on glucose metabolism in healthy females: a randomized crossover trial. Springerplus. 2016 Aug 30;5(1):1455. doi: 10.1186/s40064-016-3062-z. eCollection 2016.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- AN5029
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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