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Type 2 DiabetesD2FITNCT03144505

Comparing Moderate and High-intensity Interval Training Protocols on Biomarkers in Type 2 Diabetes Patients

A study testing MCT combined with RT Group and HIIT combined with RT Group in people with Type 2 Diabetes, run by University of Lisbon.

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

To overcome the lack of knowledge regarding the relative role of different intensities of aerobic training in adults with type 2 (T2D) diabetes, a 12 month randomized controlled trial will be performed to assess and compare the impact of two exercise groups: 1- high intensity interval training (HIIT) with resistance… Read more about this study

Who is it for?
Ages 30 to 75 years
Conditions the study is for
Type 2 Diabetes
What is being tested?
MCT combined with RT Group and HIIT combined with RT Group
Could I receive a placebo?
No, everyone receives an active treatment
How many people
96 participants
Where
No sites listed yet
Study dates
Feb 2014to Jul 2016
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 30 to 75 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Men and women diagnosed with type 2 diabetes
  • 30-75 years of age
  • BMI < 48 kg/m2

Who cannot join

  • Documented cardiovascular disease
  • Advanced neuropathy or retinopathy
  • Physical health condition that may interfere with study's protocols or exercising safety

About this study

Official title: A 12-Month Randomized Control Trial in Patients With Type 2 Diabetes: Comparing Moderate and High-intensity Interval Training Protocols on Biomarkers and Quality of Life

To overcome the lack of knowledge regarding the relative role of different intensities of aerobic training in adults with type 2 (T2D) diabetes, a 12 month randomized controlled trial will be performed to assess and compare the impact of two exercise groups: 1- high intensity interval training (HIIT) with resistance training; 2- moderate continuous training (MCT) with resistance training; and 3- a standard counseling home based control group; on hemoglobin A1c (HbA1c) as the main outcome, and other selected cardiometabolic, body composition and quality of life markers, as secondary outcomes. This investigation aims to increase the current knowledge on HIIT and the related benefits on diabetes control and treatment in a time saving and physiological efficient framework, which will improve the general health and well-being of the diabetes population. A total of 105 participants with T2D will be recruited from the Lisbon area (35 control, 35 HIIT, and 35 MCT). The investigators hypothesize that high-intensity interval training, compared to moderate continuous training, will optimize the physiological adaptations and quality of life in people with type 2 diabetes.

Read the detailed description

Contemporary exercise guidelines focus on continuous aerobic exercise using mainly moderate intensity exercises. However, there is growing evidence that HIIT has the same (or even further) benefits, with lower time commitment. This type of exercise has already been tested in T2D patients, using mostly short intervention studies, with significant improvements in relevant outcomes for T2D, such as glucose regulation. On the other hand, no study as yet compared the effects of HIIT and MCT (both combining resistance training, RT) in a long-term study design. Therefore, this study will use a 12 month randomized control trial to assess the effects of an HIIT combined with RT, and MCT combined with RT, in comparison with a control group (home base program), on glycemic control, inflammatory profile, endothelium function, cardiorespiratory fitness, quality of life, and body composition outcomes, in adult males and females with T2D.

The sample recruitment is planned to be made using media, mails, and community events. Participants can be considered eligible if age is set between 30 and 75 years old, a body mass index lower than 48 kg/m2, and if they have been diagnosed with T2D (according to the ADA criteria). Further criteria will be made upon their medical history concerning strokes, advanced neuropathy or retinopathy, and other health conditions that may interfere with this study's protocols or otherwise safe exercising. Power and sample size calculations (G-Power, Version 3.1.3) are based on a predicted hemoglobinA1c difference of 0.66 hemoglobinA1c units with an SD of effect of 1.2 hemoglobinA1c units, α=0.05, 1-β=0.80 and an expected dropout rate of 10%. The calculations yielded a minimum sample size of 105 participants (35 in each group).

The statistical analysis will be performed using SPSS Statistics (version 22.0, SPSS Inc., an IBM Company, Chicago IL, USA). Baseline differences between the interventions and the control group will be examined using ANOVA, or a non-parametric alternative in case of a non-normalized distribution. Outcome variables will be analyzed using three-way mixed factorial ANOVA. Intention-to-treat analysis will be performed. Simple and multiple regression analysis will be performed to test the relationships among the selected variables. Statistical significance will be set at p<0.05.

Conditions
Type 2 Diabetes
Being tested
MCT combined with RT Group, HIIT combined with RT Group
Keywords
Type 2 Diabetes, Exercise, High Intensity Interval Training, Glycemic Control
Medical subject headings
Diabetes Mellitus, Type 2, Motor Activity

What participants receive

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

  • MCT combined with RT GroupBehavioural

  • HIIT combined with RT GroupBehavioural

Study groups in NCT03144505
Study groupRoleWhat they receive
ControlNo interventionThe control group will be invited to an orientation session, where it will be provided detailed information concerning their home base exercise program. Additionally, once in every 4 weeks, the control group will meet for thematic sessions regarding diabetes topics, such as, nutrition, physical activity, and clinical complications. Due to ethical reasons, the control group needs to be provided with a standard counseling approach, as suggested in this research project.
MCT combined with RT GroupExperimentalMCT Group is designed to have equal energy expenditure when compared with HIIT Group. We standardized the exercise prescription according to body weight (kg), predicting that physical activity guidelines of 150 min peer week moderate intensity is equivalent to 10 kcal/kg of a combined session of RT and MCT. The MCT group will perform continuous cycling 3 days per week, with an exercise intensity of 40 to 59% of the heart rate reserve (HRR). Participants will also perform an RT circuit: 1 set of two pull upper body exercises (seated row and lat pulldown); 1 set of two push upper body exercises (chest press and shoulder press); 1 set of two leg exercises (leg press and one leg lunge); and 1 set of two core exercises (dead bug and regular plank). Each set consisting in 10 to 12 repetitions.
Receives: Behavioral: MCT combined with RT Group
HIIT combined with RT GroupExperimentalThe HIIT program will perform cycle ergometer 3 days a week, and it will be divided into three phases: preparation phase (weeks 1-4), where the participants perform MCT (40-59% of the HRR); transition phase (weeks 5-8), in which the HIIT program is introduced progressively, starting with bouts of 2 minutes at 70% of the HRR, followed by 1 minute at 40-59% of the HRR (weeks 5-6), and finishing with bouts of 80% of the HRR, followed by 1 minute at 40-59% of the HRR (weeks 7-8); training phase (weeks 9-42), where the participants perform 1 minute of exercise at 90% of the HRR, followed by 1 minute resting at 40-59% of the HRR. The HIIT session will have the same energy expenditure as the MCT group, using the 10kcal/kg week target. Participants will also fulfill the same RT as the MCT group.
Receives: Behavioral: HIIT combined with RT Group

What is being measured

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

  1. Changes from baseline HbA1c at 3, 6, 9 and 12 months

    Blood samples will be collected from an indwelling catheter for the assessment of HbA1c. Samples will be drawn into chilled, heparinized tubes and centrifuged rapidly to avoid glycolysis. HbA1c will be analyzed by immunoassay (auto analyzer Hb9210 Premier A. Menarini diagnostics).

    Measured: 12 months

Secondary outcomes (5)
  1. Changes from baseline cardiorespiratory fitness at 12 months

    A stress test with ECG and gas analysis will be performed to assess cardiorepiratory fitness and to screen for eventual heart problems, under the supervision of appropriately trained medical staff.

    Measured: 12 months

  2. Changes from baseline body composition at 3, 6, 9 and 12 months

    Subjects weight and height will be measured according to standardized procedures. Waist circumference measurements will be done according to the NIH and WHO protocol. To estimate total and intra-abdominal fat mass and fat-free mass, DXA measurements will be made using a total body scan (Hologic Explorer-W, Waltham, USA).

    Measured: 12 months

  3. Changes from baseline inflammatory profile at 12 months

    This analysis will be done in standard inflammatory variables such as TNFα, PCR, IL-6 and cortisol.

    Measured: 12 months

  4. Changes from baseline arterial function at 12 months

    Arterial function assessment will be performed on the right carotid artery using an ultrasound scanner (MyLab One, Esaote, Genova, Italy) and implemented with a previously validated radiofrequency-based tracking of the arterial wall.

    Measured: 12 months

  5. Changes from baseline quality of Life at 12 months

    Quality of life will be measured using the SF-36 Health Survey.

    Measured: 12 months

Timeline

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

  1. First posted8 May 2017
  2. Study startFeb 2014
  3. Primary completionJul 2016
  4. Study completionJul 2016

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
Supportive care
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
96 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03144505
Sponsor's protocol ID
SFRH/BD/85742/2012
Acronym
D2FIT
Status last verified
May 2017
First submitted
28 Apr 2017
Last updated
8 May 2017
Results posted
No
Data monitoring committee
No

Publications

  • Correia IR, Hetherington-Rauth M, Magalhaes JP, Judice PB, Rosa GB, Henriques-Neto D, Manas A, Ara I, Silva AM, Sardinha LB. Compensatory mechanisms from different exercise intensities in type 2 diabetes: a secondary analysis of a 1-year randomized controlled trial. Acta Diabetol. 2023 May;60(5):645-654. doi: 10.1007/s00592-023-02038-7. Epub 2023 Feb 2.

    PubMed 36729308
  • Magalhaes JP, Hetherington-Rauth M, Judice PB, Correia IR, Rosa GB, Henriques-Neto D, Melo X, Silva AM, Sardinha LB. Interindividual Variability in Fat Mass Response to a 1-Year Randomized Controlled Trial With Different Exercise Intensities in Type 2 Diabetes: Implications on Glycemic Control and Vascular Function. Front Physiol. 2021 Sep 16;12:698971. doi: 10.3389/fphys.2021.698971. eCollection 2021.

    PubMed 34603073
  • Judice PB, Magalhaes JP, Hetherington-Rauth M, Correia IR, Sardinha LB. Sedentary patterns are associated with BDNF in patients with type 2 diabetes mellitus. Eur J Appl Physiol. 2021 Mar;121(3):871-879. doi: 10.1007/s00421-020-04568-2. Epub 2021 Jan 2.

    PubMed 33389140
  • Magalhaes JP, Santos DA, Correia IR, Hetherington-Rauth M, Ribeiro R, Raposo JF, Matos A, Bicho MD, Sardinha LB. Impact of combined training with different exercise intensities on inflammatory and lipid markers in type 2 diabetes: a secondary analysis from a 1-year randomized controlled trial. Cardiovasc Diabetol. 2020 Oct 7;19(1):169. doi: 10.1186/s12933-020-01136-y.

    PubMed 33028418
  • Hetherington-Rauth M, Magalhaes JP, Judice PB, Melo X, Sardinha LB. Vascular improvements in individuals with type 2 diabetes following a 1 year randomised controlled exercise intervention, irrespective of changes in cardiorespiratory fitness. Diabetologia. 2020 Apr;63(4):722-732. doi: 10.1007/s00125-020-05089-5. Epub 2020 Jan 20.

    PubMed 31960071
  • Magalhaes JP, Melo X, Correia IR, Ribeiro RT, Raposo J, Dores H, Bicho M, Sardinha LB. Effects of combined training with different intensities on vascular health in patients with type 2 diabetes: a 1-year randomized controlled trial. Cardiovasc Diabetol. 2019 Mar 18;18(1):34. doi: 10.1186/s12933-019-0840-2.

    PubMed 30885194

Questions about this trial

What is this clinical trial studying?

A study testing MCT combined with RT Group and HIIT combined with RT Group in people with Type 2 Diabetes, run by University of Lisbon.

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 3 inclusion and 3 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 8 May 2017. Status can change between updates, so confirm with the study contact before making plans.

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?

Changes from baseline HbA1c at 3, 6, 9 and 12 months (time frame: 12 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03144505, which also lists 6 linked publications.

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 8 May 2017.

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D2FIT Clinical Trial NCT03144505 | AzTrials