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Exercise, Glucose Kinetics, and the Incretin Effect

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01607931
First Posted: May 30, 2012
Last Update Posted: August 12, 2016
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Thomas Solomon, Rigshospitalet, Denmark
  Purpose

Human volunteers will be stratified by oral glucose tolerance status: normal glucose tolerant, impaired glucose tolerant, and type 2 diabetic. All subjects will undergo 4 experimental trials: [1] an oral glucose tolerance test (OGTT) combined with infused and ingested stable isotopes of glucose to assess glucose kinetics. [2] a 1 hour bout of cycling exercise at 50% of maximum power output, immediately followed by the same OGTT combined with stable isotope glucose tracers used in trial 1. [3] an isoglycemic clamp to match the plasma glucose profile measured in trial 1. [4] a 1 hour bout of cycling exercise at 50% of maximum power output, immediately followed by an isoglycemic clamp to match the plasma glucose profile measured in trial 2.

Exercise-induced changes in oral glucose tolerance, glucose kinetics, insulin and glucagon secretion, and the incretin effect will be examined. The exercise responses will be compared between the subjects groups of different glucose tolerance status.


Condition Intervention
Type 2 Diabetes Behavioral: Exercise

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: The Effects of Acute Exercise on Glucose Kinetics, Beta-cell Function and the Incretin Effect in Subjects Representative of the Whole Glucose Tolerance Continuum

Resource links provided by NLM:


Further study details as provided by Thomas Solomon, Rigshospitalet, Denmark:

Primary Outcome Measures:
  • Glucose tolerance [ Time Frame: Plasma glucose will be measured at 10 minute intervals during the OGTT (3 hours) immediately following the period of rest or exercise ]
  • Incretin effect [ Time Frame: Plasma insulin and C-peptide will be measured at 10 minute intervals during the OGTT (3 hours) and isoglycemic clamp (3 hours) immediately following the period of rest or exercise ]

Enrollment: 12
Study Start Date: January 2013
Study Completion Date: July 2016
Primary Completion Date: April 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: Resting Trial
a 1 hour period of rest immediately prior to OGTT or isoglycemic clamp
Experimental: Exercise Trial
a 1 hour cycling exercise bout immediately prior to the OGTT or isoglycemic clamp
Behavioral: Exercise
1 hour of cycling at 50% of maximum power output

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • age 18-60 years
  • BMI 18-35 kg/m2

Exclusion Criteria:

  • insulin dependency
  • pregnancy
  • presence or history of chronic cardiovascular, pulmonary, hepatic, renal, or hematological disease, or cancer
  • contraindication to physical activity as assessed by ECG
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01607931


Locations
Denmark
Rigshospitalet
Copenhagen, Denmark
Sponsors and Collaborators
Rigshospitalet, Denmark
  More Information

Responsible Party: Thomas Solomon, Senior Researcher, Rigshospitalet, Denmark
ClinicalTrials.gov Identifier: NCT01607931     History of Changes
Obsolete Identifiers: NCT01540097
Other Study ID Numbers: EFSD-2012
First Submitted: May 23, 2012
First Posted: May 30, 2012
Last Update Posted: August 12, 2016
Last Verified: August 2016

Keywords provided by Thomas Solomon, Rigshospitalet, Denmark:
Exercise
Physical activity
Type 2 diabetes
Obesity
Incretin effect
GLP-1
GIP
Insulin secretion
Glucagon
Beta-cell function
Disposition Index

Additional relevant MeSH terms:
Diabetes Mellitus, Type 2
Diabetes Mellitus
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Incretins
Hormones
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs