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CompletedNCT04664205HI1TUpdated Jul 26, 2024Results posted

Isoenergetic High Intensity Interval Training and Moderate Intensity Training in Adults With Type I Diabetes

An interventional study of High Intensity Interval Exercise and Moderate Intensity Continuous Exercise in Diabetes Mellitus, Type 1, sponsored by University of North Carolina, Chapel Hill. Completed at 1 site in United States. Open to participants aged 18 Years to 51 Years. Per ClinicalTrials.gov, last updated 2024-07-26.

Sponsored by University of North Carolina, Chapel Hill · Not applicable, Interventional, and Supportive care

Phase
Not applicable
Study type
Interventional
Enrollment
14
Allocation
Randomized
Ages
18 Years to 51 Years
Sex
All
01

Study summary

Type 1 diabetes (T1D) is associated with increased risk of poor cardiometabolic health. Regular exercise is recommended for optimal management of comorbidities in T1D. Unique barriers to exercise exist for T1D, including fear of hypoglycemia, unpredictable glycemic excursions with exercise, and inadequate knowledge about exercise. Unlike traditional moderate intensity continuous training (MICT) which requires extended periods of time, high intensity interval training (HIIT) requires minimal time (\~10 minutes of exercise per session), with the potential to rapidly stimulate mitochondrial biogenesis and metabolism. The extent to which these exercise strategies alter metabolomic signatures of carbohydrate, fat, and amino acid metabolism in T1D is unknown. The overall goal of the proposed project is to identify the acute metabolic effects and physiological modifiers of HIIT compared to MICT and control (CON) using metabolomic profiling and cardiometabolic assessments in 14 adults with T1D. Using a randomized cross-over approach, the primary aim is to compare the metabolomics response immediately post, 1 hr post, and glycemic control through 48 hrs after HIIT, compared to MICT matched for total energy expenditure, versus a no exercise CON. An additional aim will be to characterize the influence of biological sex and physiological outcomes (i.e. body composition, lean mass, visceral fat) on the metabolomics profile of these subjects. Outcomes from the present study, with existing data from our team, will lay the foundation for a larger diet and exercise lifestyle intervention that will ultimately lead to changes in clinical practice to co-manage glycemia and cardiometabolic comorbidities.

02

Conditions studied

  • Diabetes Mellitus, Type 1
03

In context

Diabetes Mellitus

10,925 studies on the registry are indexed under Diabetes Mellitus; 1,319 are open to participants now.

This study's enrollment of 14 is below the median of 80 across 8,367 interventional studies indexed under Diabetes Mellitus.

Browse Diabetes Mellitus studies →

Lead sponsor

University of North Carolina, Chapel Hill is the lead sponsor of 1,340 studies on the registry; 133 are open to participants now.

Of its 155 completed or terminated interventional studies of FDA-regulated products, 136 (88%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 51 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Clinical diagnosis of presumed autoimmune T1D, receiving daily insulin
  • Last hemoglobin A1c \<9%
  • 18-51 years
  • Duration of T1D: ≥ 1 year
  • Body mass index (BMI) \<30 kg/m\^2
  • Generally healthy, with no conditions that could influence the outcome of the trial, and in the judgement of the investigators is a good candidate for the study, based on a review of health history

Exclusion criteria

Exclusion Criteria:

  • Physician diagnosis of active diabetic retinopathy that could be worsened by exercise
  • Physician diagnosis of peripheral neuropathy with insensate feet
  • Physician diagnosis of autonomic neuropathy
  • Medications: beta-blockers, agents that affect hepatic glucose production such as beta adrenergic agonists, xanthine derivatives; any hypoglycemic agent other than insulin.
  • Severe hypoglycemic event defined as the individual requiring a third party of hospitalization in the last 6 months
  • Diabetic ketoacidosis in the last 6 months
  • Has a closed-loop pump and not willing to use manual mode
  • Physician diagnosis of cardiovascular disease that would affect exercise tolerance
  • Currently doing HIIT
  • Severely impaired hearing or speech
  • Pregnancy
05

Study design

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

Study arms

  • Experimental
    High intensity interval training, Moderate Intensity Continuous Training, Control

    Participants randomly assigned to this arm will first receive high intensity interval training and then randomly assigned to both moderate intensity continuous training and control session, on different days.

    Other: High Intensity Interval Exercise · Other: Moderate Intensity Continuous Exercise · Other: Control

  • Experimental
    Moderate Intensity Continuous Training, High Intensity Training, Control

    Participants randomly assigned to this arm will first receive moderate intensity continuous training then randomly assigned to both high intensity interval training and a control session, on different days.

    Other: High Intensity Interval Exercise · Other: Moderate Intensity Continuous Exercise · Other: Control

  • Experimental
    Control session, High intensity interval training, moderate intensity continuous training

    Participants randomly assigned to this arm will first complete a control session (no exercise) and then randomly assigned to both by a high intensity interval training and moderate intensity continuous training session, on different days.

    Other: High Intensity Interval Exercise · Other: Moderate Intensity Continuous Exercise · Other: Control

Interventions

  • OtherHigh Intensity Interval Exercise

    One session of high intensity interval exercise

  • OtherModerate Intensity Continuous Exercise

    One session of calorically matched moderate intensity exercise

  • OtherControl

    No exercise, resting measures

06

What researchers measure

Primary outcomes

  1. Mean Energy Expenditure Between HIIT and MICT

    Energy expenditure measured via indirect calorimetry (kcals) during exercise.

    Time frame: During exercise

  2. Difference in Mean Lactate During Exercise as an Indicator of Carbohydrate Metabolism

    Lactate measured using capillary finger prick (mmol/L).

    Time frame: Baseline, 1 hour post exercise

Secondary outcomes

  1. Change in Continuous Glucose After Exercise Into Overnight

    Glucose monitoring using a continuous glucose monitor (mg/dL). Overnight values were collected based on the average mid-point of participants' sleep.

    Time frame: Immediately post-exercise and Overnight

07

Results

Posted Jul 26, 2024

Participant flow

First Exercise Session
Participant flow — First Exercise Session
MilestoneHigh Intensity Interval Training, Moderate Intensity Continuous Training, ControlModerate Intensity Continuous Training, High Intensity Training, ControlControl Session, High Intensity Interval Training, Moderate Intensity Continuous Training
Started653
Completed653
Not completed000
Second Exercise Session
Participant flow — Second Exercise Session
MilestoneHigh Intensity Interval Training, Moderate Intensity Continuous Training, ControlModerate Intensity Continuous Training, High Intensity Training, ControlControl Session, High Intensity Interval Training, Moderate Intensity Continuous Training
Started653
Completed653
Not completed000
Third Exercise Session
Participant flow — Third Exercise Session
MilestoneHigh Intensity Interval Training, Moderate Intensity Continuous Training, ControlModerate Intensity Continuous Training, High Intensity Training, ControlControl Session, High Intensity Interval Training, Moderate Intensity Continuous Training
Started653
Completed653
Not completed000

Outcome measures

PrimaryMean Energy Expenditure Between HIIT and MICT

Energy expenditure measured via indirect calorimetry (kcals) during exercise.

Time frame:
During exercise
Reported as:
Mean · kcal
Mean Energy Expenditure Between HIIT and MICT
kcalHigh Intensity Interval TrainingModerate Intensity Continuous TrainingControl Session
Mean Energy Expenditure Between HIIT and MICT264.5 ± 80.9225.5 ± 57.4—
Statistical analysis
  • High Intensity Interval Training vs Moderate Intensity Continuous Training · t-test, 2 sided · p = 0.010
PrimaryDifference in Mean Lactate During Exercise as an Indicator of Carbohydrate Metabolism

Lactate measured using capillary finger prick (mmol/L).

Time frame:
Baseline, 1 hour post exercise
Reported as:
Mean · mmol/L
Difference in Mean Lactate During Exercise as an Indicator of Carbohydrate Metabolism
mmol/LHigh Intensity Interval TrainingModerate Intensity Continuous TrainingControl Session
During exercise8.46 ± 2.837.11 ± 2.19—
1 hour post2.30 ± 1.051.75 ± 0.46—
Statistical analysis
  • High Intensity Interval Training vs Moderate Intensity Continuous Training · ANCOVA · p = 0.069
SecondaryChange in Continuous Glucose After Exercise Into Overnight

Glucose monitoring using a continuous glucose monitor (mg/dL). Overnight values were collected based on the average mid-point of participants' sleep.

Time frame:
Immediately post-exercise and Overnight
Reported as:
Mean · mg/dL
Change in Continuous Glucose After Exercise Into Overnight
mg/dLHigh Intensity Interval TrainingModerate Intensity Continuous TrainingControl Session
Immediately post exercise155.2 ± 11.3146.9 ± 8.0124.5 ± 6.3
Overnight139.7 ± 18.7165.6 ± 6.0150.3 ± 7.6
Statistical analysis
  • High Intensity Interval Training vs Moderate Intensity Continuous Training vs Control Session · ANOVA · p = 0.478

Adverse events

Collected over From the time of signing the informed consent through the end of the study, a total of up to approximately 1 month. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
High Intensity Interval Training0/14 (0%)0/14 (0%)0/14 (0%)
Moderate Intensity Continuous Training0/14 (0%)0/14 (0%)0/14 (0%)
Control Session0/14 (0%)0/14 (0%)0/14 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)All Participants
<=18 years0
Between 18 and 65 years14
>=65 years0
Sex: Female, Male
Sex: Female, Male(Participants)All Participants
Female7
Male7
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)All Participants
Hispanic or Latino2
Not Hispanic or Latino12
Unknown or Not Reported0
Race (NIH/OMB)
Race (NIH/OMB)(Participants)All Participants
American Indian or Alaska Native0
Asian2
Native Hawaiian or Other Pacific Islander0
Black or African American0
White12
More than one race0
Unknown or Not Reported0
Region of Enrollment
Region of Enrollment(Participants)All Participants
United States14
Percent Body Fat
Percent Body Fat(percent body fat)All Participants
Mean26.6 ± 11.0
08

Study locations

1 site
  • Applied Physiology Laboratory
    Chapel Hill, North Carolina 27599, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Sep 17, 2021
  • Informed consent form · Sep 17, 2021

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: Yes — Deidentified individual data that supports the results will be shared beginning 12 to 24 months following publication provided the investigator who proposes to use the data has approval from an Institutional Review Board (IRB), Independent Ethics Committee (IEC), or Research Ethics Board (REB), as applicable, and executes a data use/sharing agreement with UNC.

Supporting information: Study protocol

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 26, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04664205
Lead sponsor
University of North Carolina, Chapel Hill
Collaborators
North Carolina Diabetes Research Center
Responsible party
Sponsor
First posted
Dec 11, 2020
Start date
Feb 1, 2021
Primary completion
Sep 15, 2022
Completion
Sep 15, 2022
Results posted
Jul 26, 2024
Last update
Jul 26, 2024

Study contacts

Abbie Smith-Ryan, PhD
principal investigator · University of North Carolina

Oversight

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

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This study is completed, as verified in Feb 2022. You cannot join it, but the record below documents what was studied.

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