- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03773731
High Intensity Interval Training in Prediabetes
Impact of High Intensity Interval Training vs. Continuous Aerobic Training on Platelet Insulin Resistance, Platelet Function and Hepatic Steatosis in Patients With Prediabetes
Study Overview
Status
Conditions
Detailed Description
Background:
The prevalence of type 2 diabetes mellitus (T2DM) is rising dramatically. T2DM represents a major cause for cardiovascular disease -related mortality and morbidity and increasingly burdens healthcare systems. While the fundamental pathomechanism of T2DM is insulin resistance of muscle and adipose tissue, recent studies demonstrate that insulin resistance in T2DM also occurs in platelets. As insulin directly inhibits platelet function, this mechanism might contribute to platelet activation and platelet hyperreactivity, which were in fact detected in diabetic patients. Since (inadvertent) platelet activation is causally linked to the development of atherosclerosis and atherothrombosis, regulation of platelet function is of utmost importance. Exercise training, performed on a regular basis has been shown to reduce morbidity and mortality in sedentary and diseased populations. Furthermore, exercise training improves whole body insulin sensitivity - however, it is currently unclear, if exercise training also affects insulin sensitivity of platelets. Recently, a time-saving interval training protocol has been adapted for T2DM-patients. Since this adapted high intensity interval training (HIIT) needs a fractional time commitment of exercise training according to current guidelines, HIIT possibly represents a promising instrument to increase adherence to exercise and thereby reduce T2DM morbidity.
Aims:
The primary aim of this study is to investigate the effect of 12 weeks of HIIT vs. continuous training (CT) on platelet insulin sensitivity and platelet (hyper)reactivity in prediabetic patients.
Secondary aims are to assess the effect of HIIT and CT on whole body insulin sensitivity and fitness in prediabetic patients as well as on various parameters of platelet function and on the hepatic fat content.
Hypotheses:
Our main hypothesis is that HIIT increases platelet insulin sensitivity and thereby decreases platelet activation/reactivity in patients with prediabetes. Methods: 44 prediabetic (see inclusion criteria) patients will be enrolled in this study. Patients will randomly be assigned to a HIIT group (committed to a supervised training program) or a CT group. After initial examinations (supervised graded exercise test, platelet function tests, oral glucose tolerance test, measurement of the hepatic fat content via FibroScan®), supervised training will be performed over a period of 12 weeks. Tests performed at the beginning of the study will be repeated after the training period.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Ivo Volf, PhD
- Phone Number: 31421 +43 40160
- Email: ivo.volf@meduniwien.ac.at
Study Contact Backup
- Name: Rochus Pokan, MD
- Phone Number: +43 4277 4887225
- Email: rochus.pokan@univie.ac.at
Study Locations
-
-
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Vienna, Austria, 1090
- Recruiting
- MUVienna
-
Contact:
- Stefan Heber, MD, PhD
- Phone Number: 31425 0043 1 40160
- Email: stefan.heber@meduniwien.ac.at
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- prediabetic (insulin-insensitive) patients
- either fasting plasma glucose 100- 125 mg/dl or HbA1c 5.7 - 6.4
- < 3kg bodyweight change within the last 6 months
Exclusion Criteria:
- Any contraindications for exercise
- resulting from anamnesis ( e.g. history of angina pectoris, peripheral arterial disease), ECG at rest or during graded exercise test, echocardiogram, echocardiography or lung function test
- chronical joint pain that makes exercise training on bicycle ergometers impossible
- any conditions that make the successful participation in the study unlikely
- islet cell autoantibodies
- Medication: insulin, thiazolidindiones, statins, antidepressants
- Secondary diseases: History of end-stage liver or kidney disease; pronounced neuropathy or retinopathy
- drug or alcohol abuse
Study Plan
How is the study designed?
Design Details
- Primary Purpose: BASIC_SCIENCE
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: DOUBLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: High intensity interval training
3x/week the following 45 min training protocol on bicycle ergometer for 12 weeks:
|
Exercise training on bicycle ergometer with high intensity bouts of 1 min interspersed by low intensity recovery intervals
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ACTIVE_COMPARATOR: Moderate intensity continuous training
3x/week the following 45 min training protocol on bicycle ergometer for 12 weeks:
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Exercise training on bicycle ergometer with moderate intensity (60 - 65 % of individual maximal power output)
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
EC50 (half-maximal effective concentration) of TRAP-6 (thrombin-receptor activating peptide) in terms of surface CD62P (=platelet selectin, P-selectin) expression: group differences after 12 weeks of training
Time Frame: 12 weeks
|
12 weeks
|
EC50 of insulin in terms of intraplatelet VASP (vasodilator-stimulated phosphoprotein)-phosphorylation: group differences after 12 weeks of training
Time Frame: 12 weeks
|
12 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
whole body insulin sensitivity
Time Frame: 12 weeks
|
12 weeks
|
|
Maximal oxygen consumption
Time Frame: 12 weeks
|
Unit: ml/min/kg bodymass
|
12 weeks
|
EC50 of other platelet agonists in terms of various platelet activation markers
Time Frame: 12 weeks
|
12 weeks
|
|
EC50 of prostacyclin in terms of intraplatelet VASP-phosphorylation
Time Frame: 12 weeks
|
12 weeks
|
|
Transient elastography (FibroScan®) controlled attenuation parameter (CAP)
Time Frame: 12 weeks
|
The controlled attenuation parameter (CAP) has demonstrated good accuracy in quantifying the levels of liver steatosis and fibrosis in patients with NAFLD
|
12 weeks
|
Fatty Liver Index (FLI)
Time Frame: 12 weeks
|
12 weeks
|
Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ANTICIPATED)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
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
- Exercise_platelet_insulin
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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