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Diabetes Mellitus, Type 2NCT06668090

Bone Properties Following Exercise Induced Changes in Insulin Sensitivity in People With Type 2 Diabetes

A study testing Moderate intensity bike exercise in people with Diabetes Mellitus, Type 2 and Insulin Resistance, run by Aarhus University Hospital at 1 site in Denmark.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Diabetes mellitus type 2 is associated with low bone turnover and increased risk of bone fractures. Bone mineral density, however, is increased and cannot explain the increased fracture risk per se. Read more about this study

Who is it for?
Ages 45 years and older
What is being tested?
Moderate intensity bike exercise
Could I receive a placebo?
No, everyone receives an active treatment
How many people
42 participants
Where
1 siteDenmark
Study dates
15 Dec 2022to 28 Jun 2025
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 45 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Diabetes mellitus type 2
  • Age ≥ 45 years
  • Male or female sex
  • Women must be postmenopausal

Who cannot join

  • Recent substantial changes in diet (within 3 months)
  • Recent substantial changes in activity level (within 3 months)
  • Recent substantial weight changes (within 3 months)
  • Current or previous treatment (within the last 2 years) with non-oral anti-diabetics or oral GLP-1 analogs
  • HbA1c ≥ 90 mmol/mol
  • HbA1c < 48 mmol/mol without anti-diabetic medication
Show all 26Show fewer
  • Premature menopause (menopause before 40 years of age)
  • Current pregnancy
  • Treatment with one of the following medications:
  • Systemic glucocorticoids (within the last 2 years)
  • Antiresorptive or bone anabolic medication (ever)
  • Lithium (ever)
  • Anticonvulsive medication (current)
  • Menopausal replacement therapy (currently)
  • Estimered glomerular filtrationsrate (eGFR) < 60 mL/minutes
  • High level of physical activity, assessed by the investigators to interfere with the study results
  • Substantial cardiovascular, endocrine, renal, hepatic, rheumatological, gastrointestinal or other disorders assessed by the investigator
  • Electronic implants
  • Osteoporosis or other bone disease
  • Resent bone fracture (within 6 months)
  • Previous bone fracture in either both tibial bones or both radial bones
  • Parathyroid or calcium metabolism disorder
  • Vitamin D deficiency (< 50 nmol/L)
  • Other substantial medical disorder in unstable phase or active cancer within the last five years except spino- or basocellular carcinoma
  • Lack of ability to complete the intervention
  • Patients assessed uneligible by the investigator to participate in the study

Trial locations and contacts

1 site in 1 country.

Denmark1 site
  • Steno Diabetes Center Aarhus

    Aarhus N, 8200

Other trials in Denmark

About this study

Official title: Biochemical Bone Turnover Markers and Bone Mechanical Properties Following Exercise Induced Changes in Insulin Sensitivity in People With Type 2 Diabetes

Diabetes mellitus type 2 is associated with low bone turnover and increased risk of bone fractures.

Bone mineral density, however, is increased and cannot explain the increased fracture risk per se. The pathophysiology is not completely understood, but the decrease in bone turnover is believed to cause an accumulation of microcracks in bone tissue leading to bone fragility. The decrease in bone turnover may arise directly from insulin resistance or indirectly through formation of advanced glycation end-products.

The main aim objective is to investigate how increases in insulin sensitivity following 12 weeks of moderate intensity bike exercise affect biochemical bone turnover markers and biomechanical bone properties in individuals with diabetes mellitus type 2.

Being tested
Moderate intensity bike exercise
Keywords
Diabetes Mellitus, Type 2, Bone, Bioelectric impedance, Diabetic bone disease, Insulin supression test (IST), Bone turnover
Medical subject headings
Diabetes Mellitus, Type 2, Insulin Resistance, Bone Diseases, Metabolic, Osteoporosis, Musculoskeletal Diseases, Metabolic Diseases, Glucose Metabolism Disorders

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Moderate intensity bike exerciseBehavioural

    Participants will do moderate intensity bike exercise for up to one hour thrice weekly for 12 weeks.

Study groups in NCT06668090
Study groupRoleWhat they receive
ExerciseExperimentalModerate intensity bike exercise thrice weekly for 12 week added to the usual activity level. Each participant receive an individual exercise program based on their maximum heart rate. Exercise is not supervised, but compliance is monitored. It will either be performed at home or at gyms. No changes in diet.
Receives: Behavioral: Moderate intensity bike exercise
Control/no interventionNo intervention12 weeks with usual activity level. No changes in diet.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Steady state plasma glucose during stage 1 of insulin suppression test (mmol/L)

    Subjects are administered a 25 μg octreotide bolus at time-point 0 minutes and subsequently infused with 0.27 μg octreotide / m2 • minute, 6 milliunits (mU) insulin / m2 • minute, and 50 mg glucose / m2 • min.

    Measured: 100, 110 and 120 minutes after test-start. 12-week change. Comparison between pre-intervention and end-intervention steady state plasma glucose.

  2. Steady state plasma glucose during stage 2 of insulin suppression test (mmol/L)

    Subjects are administered a 25 μg octreotide bolus at time-point 0 minutes and subsequently infused with 0.27 μg octreotide / m2 • minute, 6 (mU) insulin / m2 • minute, and 50 mg glucose / m2 • minute. At time-point 120 minutes, infusion speeds are increased to to 32 mU insulin / m2 • minute and 267 mg glucose / m2 • minute.

    Measured: 220, 230 and 240 minutes after test-start. 12-week change. Comparison between pre-intervention and end-intervention steady state plasma glucose

Secondary outcomes (36)
  1. Hemoglobin A1c (mmol/mol)

    During fasting.

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  2. Fasting Homeostatic Model Assessment for Insulin Resistance by C-peptide (arbitrary unit).

    Measured: 12-week change. Comparison between pre-intervention blood samples and end-intervention blood samples.

  3. Circulating glucose (mmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  4. Circulating insulin (pmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  5. Alkaline phosphatase (total and bone type) (U/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  6. Circulating CTX (µg/l)

    Measured during fasting and during stage 1 and 2 of the insulin suppression test They are measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  7. Circulating Osteocalcin (µg/l)

    Measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  8. Circulating Osteoglycin (µg/l)

    They are measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  9. Circulating P1NP (µg/l)

    Measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  10. Circulating Sclerostin (µg/l)

    Measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  11. Ionized calcium (mmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  12. Circulating Parathyroid hormone (pmol/l)

    Measured during fasting and during stage 1 and 2 of the insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  13. Vitamin D (nmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  14. Bone Mineral Density (t-score) in hip and spine

    Dual-energy X-ray absorptiometry (DXA).

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  15. Advanced glycation end-products (AGEs) in skin

    Measurement of skin autofluorescence in the forearm

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  16. Results from the HRpQCT scan including trabecular and cortical state

    Measured in the tibial and radial bone on the non-dominant side

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  17. Body composition assessed with whole-body Dual-energy X-ray absorptiometry (DXA)

    Measured during fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  18. FIB-4 score

    Using age, ALAT, ASAT and thrombocytes

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  19. Alanine aminotransferase (unit(U)/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  20. Aspartate aminotransferase (U)/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  21. Thrombocytes (10^9/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  22. Bioelectric impedance analysis (BIA)

    Following measurements will be evaluated: Phase angle, membrane capacitance, impedance, capacitive resistance, resistance.

    Measured during fasting and stage 1 and 2 of insulin suppression test

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  23. Steady state glycerol and free fatty acids during stage 1 and 2 of insulin suppression test (mmol/L)

    Subjects are administered a 25 μg octreotide bolus at time-point 0 minutes and subsequently infused with 0.27 μg octreotide / m2 • minute, 6 (mU) insulin / m2 • minute, and 50 mg glucose / m2 • minute. At time-point 120 minutes, infusion speeds are increased to to 32 mU insulin / m2 • minute and 267 mg glucose / m2 • minute.

    Measured: 100, 110, 120, 220, 230 and 240 minutes after test-start. 12-week change. Comparison between pre-intervention and end-intervention steady state plasma glucose.

  24. Total cholesterol (mmol/l),

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  25. Low density lipoprotein (LDL) (mmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  26. High density lipoprotein (HDL) (mmol/l)

    Fastomg

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  27. Triglycerides (mmol/l)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  28. Blood pressure (mmHg)

    Average daytime and night-time ambulatory blood pressure. 24-hour ambulatory blood pressure measurement, measured every 20 minutes during daytime and every 30 minutes during nighttime.

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  29. Body composition assessed with bioelectric impedance analysis (BIA)

    Measured during fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  30. Circulating adiponectin

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  31. Leptin (n/mL)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  32. Alpha-hydroxybutyrate (μg/mL)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  33. Monocyte chemoattractant protein-1 (pg/ml)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  34. Interleukin 1 beta (pg/ml)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  35. Interleukin 6 (pg/ml)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

  36. Estimated glomerular filtration rate (ml/min/1,73m2)

    Fasting

    Measured: 12-week change. Comparison between pre-intervention and end-intervention

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted31 Oct 2024
  2. Study start15 Dec 2022
  3. Primary completion26 Jun 2025
  4. Study completion28 Jun 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
42 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06668090
Sponsor's protocol ID
1-10-72-221-19
Status last verified
Jul 2025
First submitted
30 Oct 2024
Last updated
14 Aug 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A study testing Moderate intensity bike exercise in people with Diabetes Mellitus, Type 2 and Insulin Resistance, run by Aarhus University Hospital at 1 site in Denmark.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 26 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 14 Aug 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Denmark. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Steady state plasma glucose during stage 1 of insulin suppression test (mmol/L) (time frame: 100, 110 and 120 minutes after test-start. 12-week change. Comparison between pre-intervention and end-intervention steady state plasma glucose.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Aug 2025.

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