ClinicalTrials.gg
CompletedNCT03497260FruDegUpdated Sep 20, 2019

Fructose in Exercising Individuals With Type 1 Diabetes Using Insulin Degludec

An interventional study of Fructose and Plain water in Type 1 Diabetes Mellitus and Diabetes Complications, sponsored by Insel Gruppe AG, University Hospital Bern. Completed at 1 site in Switzerland. Open to male participants aged 18 Years to 45 Years. Per ClinicalTrials.gov, last updated 2019-09-20.

Sponsored by Insel Gruppe AG, University Hospital Bern · Not applicable, Interventional, and Supportive care

Phase
Not applicable
Study type
Interventional
Enrollment
15
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
Male
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 16 studies in Diabetes Mellitus, Type 1 by Insel Gruppe AG, University Hospital Bern — none open to participants now, none under way, none of them phase 3. Diabetes Mellitus, Type 1 · Insel Gruppe AG, University Hospital Bern.

Enrollment
7th of 13
15 · median 15
Started
2019
with 3 others
No phase
10 of 16
none open now
Registered
4th of 16
by date

Among the 16 studies in Diabetes Mellitus, Type 1 by Insel Gruppe AG, University Hospital Bern, this one is the 7th largest by enrollment of the 13 interventional ones that give a count, is one of 4 that started in 2019, is one of 10 with no phase, and was the 4th registered.

Diabetes Mellitus, Type 1

3,754 studies on the registry are indexed under Diabetes Mellitus, Type 1; 600 are open to participants now.

Browse Diabetes Mellitus, Type 1 studies →

Open to participants now

None of the 16 studies in Diabetes Mellitus, Type 1 by Insel Gruppe AG, University Hospital Bern is open now.

Where they have run

Who these studies take

Of the 411 Diabetes Mellitus, Type 1 studies recruiting now, 128 (31%) set no upper age limit and 257 (63%) stop at 75 or younger; 184 take children under 18; 64 take healthy volunteers.

This study: 18 Years to 45 Years · male · no healthy volunteers.

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Download CSVNarrow it in search →With an account: the 16 studies in Diabetes Mellitus, Type 1 by Insel Gruppe AG, University Hospital Bern as a file.
02

Study summary

To determine and compare the time-to-hypoglycaemia (defined as plasma glucose \<3.9mmol/L) in individuals with type 1 diabetes treated with ultra-Long acting insulin degludec during aerobic exercise with or without prior ingestion of a single oral fructose load.

Read the detailed description

Glycaemic control remains complex and demanding during exercise for type 1 diabetes (T1D) patients. Traditional treatment guidelines for exercise emphasizing the reduction of insulin doses and/or ingestion of additional carbohydrates are of limited applicability for patients treated with ultra-long acting basal insulin analogues. Dose reductions may require two to three days for modern basal insulin analogues in order to achieve an adapted steady state, hereby increasing the risk of inadequate insulin-following exercise. If T1D patients engage in recreational exercise - as recommended by every international treatment guideline - current treatment strategies may simply not be sufficient.

As a consequence for patients treated with modern basal insulin analogues, it seems more adequate not to modify insulin doses but to apply alternative strategies for recreational exercise. The ingestion of fructose, an insulin-independent carbohydrate, which increases lipid oxidation but attenuates the dependency on carbohydrates may offer a novel strategy. Up to date, only preliminary data for fructose have been produced regarding clinical effectiveness and underlying mechanisms in the prevention of hypoglycaemia. The present comprehensive study aims to investigate the clinical efficacy, feasibility, and safety of a pre-exercise oral fructose load without modification of insulin degludec in T1D patients.

03

Conditions studied

  • Type 1 Diabetes Mellitus
  • Diabetes Complications

Keywords

  • Type 1 Diabetes, Fructose, Exercise, Hypoglycaemia, Degludec
04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
Male
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Type 1 diabetes as defined by the World Health Organization (WHO) for at least 1 year or confirmed negative C-peptide (\<100pmol/l with concomitant blood glucose >4 mmol/l)
  • Male subjects aged between 18-45 years
  • \<8.0% (64mmol/mol) based on analysis from the central laboratory unit of the University Hospital Bern.
  • Basal/Bolus-insulin regimen with insulin degludec for at least 3 months, with good knowledge of insulin self-management
  • Regular physical activity (at least 30 min of moderate exercise 3 times weekly)
  • Written

Exclusion criteria

Exclusion Criteria:

  • Relevant diabetic complications as judged by the investigator
  • Total daily insulin dose >2 IU/kg/day
  • Hypoglycaemia unawareness (Gold score > 4) or any episode of severe hypoglycaemia as defined by the American Diabetes Association within the last 6 months
  • Physical or psychological disease likely to interfere with the normal conduct of the study and interpretation of the study results as judged by the investigator
  • Current treatment with drugs known to interfere with metabolism, e.g. systemic , statins etc.
  • Known fructose-intolerance or malabsorption
  • Known allergy to one of the study drugs
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
15 participants (actual)

Study arms

  • Experimental
    Fructose in water first, water only second

    Intake of 20 g of fructose dissolved in 200 ml of tap water at first visit; intake of 200 ml of tap water at second visit

    Dietary Supplement: Fructose · Other: Plain water

  • Experimental
    Water only first, Fructose in water second

    Intake of 200 ml of tap water at first visit; intake of 200 ml of 20 g of fructose dissolved in 200 ml of tap water at second visit

    Dietary Supplement: Fructose · Other: Plain water

Interventions

  • Dietary supplementFructose

    Intake of 20 g of fructose dissolved in 200 ml of tap water within 5 minutes 30 minutes prior to exercise.

  • OtherPlain water

    Intake of 200 ml of tap water within 5 minutes 30 minutes prior to exercise.

06

What researchers measure

Primary outcomes

  1. Time (in minutes) to hypoglycaemia (plasma glucose <3.9mmol/l)

    The development of hypoglycaemia will be determined by repeated measurement of plasma glucose.

    Time frame: From time point 0 minutes (initiation of exercise) to time point 60 minutes (completion of exercise) or development of hypoglycaemia

Secondary outcomes

  1. Glucose levels before exercise

    Plasma glucose will be measured repeatedly every 5 minutes

    Time frame: Time point -30 minutes until time point 0 minutes (initiation of exercise)

  2. Glucose levels during exercise

    Plasma glucose will be measured repeatedly every 5 minutes

    Time frame: From time point 0 minutes until time point 60 minutes (completion of exercise) or development of hypoglycaemia

  3. Glucose levels after exercise

    Plasma glucose will be measured repeatedly every 5 minutes

    Time frame: From time point 0 minutes until time point 90 minutes

  4. Lactate levels before exercise

    Lactate will be measured repeatedly every 5 minutes

    Time frame: From time point -30 minutes until time point 0 minutes (initiation of exercise)

  5. Lactate levels during exercise

    Lactate will be measured repeatedly every 5 minutes

    Time frame: From time point 0 minutes until time point 60 minutes (completion of exercise) or development of hypoglycaemia

  6. Lactate levels after exercise

    Lactate will be measured repeatedly every 5 minutes

    Time frame: From time point 0 minutes until time point 90 minutes

  7. Insulin levels before exercise

    Lactate will be measured repeatedly every 15 minutes

    Time frame: Time point -30 minutes until time point 0 minutes (initiation of exercise)

  8. Insulin levels during exercise

    Insulin will be measured repeatedly every 15 minutes

    Time frame: From time point 0 minutes until time point 60 minutes (completion of exercise) or development of hypoglycaemia

  9. Insulin levels after exercise

    Insulin will be measured repeatedly every 15 minutes

    Time frame: From time point 0 minutes until time point 150 minutes

  10. Heart rate before exercise

    Heart rate will be measured using an electro-cardio-gramme

    Time frame: Time point -30 minutes until time point 0 minutes (initiation of exercise)

  11. Heart rate during exercise

    Heart rate will be measured using an electro-cardio-gramme

    Time frame: From time point 0 minutes until time point 60 minutes (completion of exercise) or development of hypoglycaemia

  12. Oxygen consumption before exercise

    Oxygen consumption will be measured via spirometry

    Time frame: Between 15 minutes and 5 minutes before initiation of exercise

  13. Oxygen consumption during exercise

    Oxygen consumption will be measured via spirometry

    Time frame: Between 15 minutes and 20 minutes during exercise

  14. Carbon dioxide production before exercise

    Carbon dioxide production will be measured via spirometry

    Time frame: Between 15 minutes and 5 minutes before initiation of exercise

  15. Carbon dioxide production during exercise

    Carbon dioxide production will be measured via spirometry

    Time frame: Between 15 minutes and 20 minutes during exercise

07

Study locations

1 site
  • Division of Endocrinology, Diabetes and Clinical Nutrition, Bern University Hospital
    Bern, 3010, Switzerland
08

References and documents

Publications

  • Kosinski C, Herzig D, Laesser CI, Nakas CT, Melmer A, Vogt A, Vogt B, Laimer M, Bally L, Stettler C. A Single Load of Fructose Attenuates the Risk of Exercise-Induced Hypoglycemia in Adults With Type 1 Diabetes on Ultra-Long-Acting Basal Insulin: A Randomized, Open-Label, Crossover Proof-of-Principle Study. Diabetes Care. 2020 Sep;43(9):2010-2016. doi: 10.2337/dc19-2250. Epub 2020 Jun 26. PubMed 32591421 ↗

Individual participant data

Plan to share: Undecided

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2019 to primary completion in Sep 2019, 8 months.

Of 844 non-industry interventional studies with no phase under Diabetes Mellitus, Type 1, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 10 and three quarters within 38. This study's 8 months is below that.

Counting every sponsor, half of 949 studies reached it within 18 months; a quarter within 9 and three quarters within 35.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 6, 2018
First posted
Apr 13, 2018
StartActual
Jan 4, 2019
Primary completionActual
Sep 6, 2019
CompletionActual
Sep 8, 2019
Last update
Sep 20, 2019
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 20, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03497260
Responsible party
Sponsor
First posted
Apr 13, 2018
Start date
Jan 4, 2019
Primary completion
Sep 6, 2019
Completion
Sep 8, 2019
Last update
Sep 20, 2019

Study contacts

Christoph Stettler, MD
principal investigator · Inselspital, Bern University Hospital, University of Bern

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2019. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Fructose

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