Exercise Detection Study

Study Results

Results available

Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.

View full results

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-02-29

Study Completion Date

2018-02-02

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

The risk of hypoglycemia in individuals with type 1 diabetes increases considerably during exercise. As a result, many patients with type 1 diabetes experience fear of and reluctance to pursue physical activity, in order to avoid the discomforting symptoms associated with hypoglycemia. The bi-hormonal artificial pancreas, a device used for automatic delivery of insulin and glucagon subcutaneously to subjects with type 1 diabetes, is paving the way to revolutionize the management of this disease. The investigator's group has recently completed a study of the bi-hormonal artificial pancreas system during exercise, suggesting reduced hypoglycemia around the exercise period. In order to prepare for a future home study, the ability to detect, grade, and classify physical activity so as to appropriately adjust system parameters is vital in helping to prevent exercise induced hypoglycemia in the home setting.

This study is designed to collect 3-axis accelerometry data and heart rate data during a variety of different home activities, as well as during formal exercise in both healthy subjects and subjects with type 1 diabetes. Additionally, the investigators will observe the change in glucose levels before and after exercise in subjects with type 1 diabetes.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Context Aware Data Gathering Study

NCT04154904

Type 1 Diabetes

COMPLETED NA

Digital Exercise for Middle-Aged Adults With Type 1 Diabetes and Other Absolute Insulin Deficiency Diabetes

NCT06098729

Type 1 Diabetes Latent Autoimmune Diabetes in Adults Pancreatitis

COMPLETED NA

HIT on Hypoglycemic Risk in Type 1 Diabetes (T1D)

NCT03598400

Type1diabetes

COMPLETED NA

Restoration of Hypoglycemia Awareness With Home-based High Intensity Interval Training

NCT04825366

Type 1 Diabetes Hypoglycemia Unawareness

COMPLETED NA

The Integration of Physical Activity Into the Clinical Decision Process of People with Type 1 Diabetes

NCT05670366

Type 1 Diabetes

COMPLETED NA

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

The artificial pancreas, a device used for automatic delivery of insulin and glucagon subcutaneously to subjects with type 1 diabetes, is paving the way to revolutionize the management of this disease. Already, the benefit of improved glycemic control compared to current open-loop pump therapy has been demonstrated in several trials. The investigator's group has shown that artificial pancreas algorithm dual hormone system effectively manages blood glucose in a clinic setting and the investigators have specifically shown great progress using glucagon to reduce hypoglycemic episodes outside of exercise. The investigators most recent inpatient study, as yet unpublished, shows that adjusting insulin and glucagon delivery during closed loop treatment, after announcing exercise, effectively reduces mean time below a glucose level of 70 mg/dl when compared to closed loop control without adjustments. The investigators utilized initial open-loop data from this study to help devise dosing changes for the artificial pancreas algorithm.

In order to prepare for a future home study, the ability to detect, grade, and classify physical activity so as to appropriately adjust system parameters is vital in helping to prevent exercise induced hypoglycemia in the home setting. Currently, our closed-loop system transmits heart rate and accelerometry outputs from a Zephyrlife BioPatch monitoring device to a Nexus 5 smart phone master controller via Bluetooth. The algorithm then converts the heart rate and accelerometry data into modified estimated energy expenditure - accounting for age, weight, height, sex, resting and sitting heart rates - to determine if exercise is present. However, further data collection is needed to hone the specificity and sensitivity of the detection algorithm to account for a wide variety of subject characteristics and activities.

This study is designed to collect 3-axis accelerometry data and heart rate data during a variety of different home activities, as well as during formal exercise, which included aerobic exercise (on a calibrated treadmill) and resistance exercise (straight-leg raises or equivalent) in healthy subjects as well as subjects with type 1 diabetes. Optionally VO2 data from a portable VO2 mask will be obtained. The data collected will be used to further enhance our algorithm that, in future closed-loop studies, will detect exercise and automatically trigger algorithmic adjustments to reduce exercise-related hypoglycemia during and after exercise in individuals with type 1 diabetes.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Type 1 Diabetes

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

Review each arm or cohort in the study, along with the interventions and objectives associated with them.

Aerobic First, Resistance Second

Subjects will complete three 15 minute periods of aerobic exercise, with 10 minute recovery between each period. This will be followed by 5-15 minute periods of up to 7 activities of daily living with an additional 20 minute period of resistance exercise, such as straight leg raises.

Group Type EXPERIMENTAL

Aerobic Exercise

Intervention Type BEHAVIORAL

Exercise for three 15 minute periods, with 10 minute rests between each period, and exercise intensity will vary between periods to achieve different energy expenditures, which may be determined based on VO2 measurements.

Resistance Exercise

Intervention Type BEHAVIORAL

Subjects will perform 5-15 minutes of up to 7 different activities of daily living, followed by 20 minutes of resistance exercise, such as straight leg raises.

Resistance First, Aerobic Second

Subjects will complete 5-15 minute periods of up to 7 activities of daily living with an additional 20 minute period of resistance exercise, such as straight leg raises. This will be followed by three 15 minute periods of aerobic exercise, with 10 minute recovery between each period.

Group Type EXPERIMENTAL

Aerobic Exercise

Intervention Type BEHAVIORAL

Exercise for three 15 minute periods, with 10 minute rests between each period, and exercise intensity will vary between periods to achieve different energy expenditures, which may be determined based on VO2 measurements.

Resistance Exercise

Intervention Type BEHAVIORAL

Subjects will perform 5-15 minutes of up to 7 different activities of daily living, followed by 20 minutes of resistance exercise, such as straight leg raises.

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Aerobic Exercise

Exercise for three 15 minute periods, with 10 minute rests between each period, and exercise intensity will vary between periods to achieve different energy expenditures, which may be determined based on VO2 measurements.

Intervention Type BEHAVIORAL

Resistance Exercise

Subjects will perform 5-15 minutes of up to 7 different activities of daily living, followed by 20 minutes of resistance exercise, such as straight leg raises.

Intervention Type BEHAVIORAL

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

1. Male or female subjects 21 to 45 years of age with a diagnosis of T1D for at least 6 months on an insulin pump.
2. Physically active on a regular basis, i.e. at least 3 days of scheduled physical activity per week and willing to perform approximately 60 minutes of exercise (as determined by the investigator after reviewing the subjects activity level).
3. Willingness to follow all study procedures.
4. Willingness to sign informed consent and HIPAA documents.

1. Male or female subjects 21 to 45 years of age.
2. Physically active on a regular basis, i.e. at least 3 days of scheduled physical activity per week and willing to perform approximately 60 minutes of exercise (as determined by the investigator after reviewing the subjects activity level).
3. Willingness to follow all study procedures.
4. Willingness to sign informed consent and HIPAA documents.

Exclusion Criteria

a. Pregnancy or Lactation: i. For women of childbearing potential, there is a requirement for a negative urine pregnancy test. b. Any cardiovascular disease, defined as a clinically significant EKG abnormality at the time of screening or any history of: stroke, heart failure, myocardial infarction, angina pectoris, or coronary arterial bypass graft or angioplasty. Diagnosis of 2nd or 3rd degree heart block or any non-physiological arrhythmia judged by the investigator to be exclusionary. c. Renal insufficiency (GFR \< 60 ml/min, using the MDRD equation as report by the OHSU laboratory). d. Hematocrit of less than or equal to 34%. e. History of severe hypoglycemia during the past 12 months prior to screening visit or hypoglycemia unawareness as judged by the investigator. f. Adrenal insufficiency. g. Any active infection. h. Known or suspected abuse of alcohol, narcotics, or illicit drugs (except marijuana use).

i. Seizure disorder. j. Active foot ulceration. k. Severe peripheral arterial disease characterized by ischemic rest pain or severe claudication. l. Major surgical operation within 30 days prior to screening. m. Use of an investigational drug within 30 days prior to screening. n. Chronic usage of any immunosuppressive medication (such as cyclosporine, azathioprine, sirolimus, or tacrolimus). o. Bleeding disorder, treatment with warfarin, or platelet count below 50,000. p. Current administration of oral or parenteral corticosteroids. q. Any life threatening disease, including malignant neoplasms and medical history of malignant neoplasms within the past 5 years prior to screening (except basal and squamous cell skin cancer). r. Any concurrent illness, other than diabetes, that is not controlled by a stable therapeutic regimen. s. Beta blockers or non-dihydropyridine calcium channel blockers. t. A positive response to any of the questions from the Physical Activity Readiness Questionnaire, see Appendix A. u. Any chest discomfort with physical activity, including pain or pressure, or other types of discomfort. v. Any clinically significant disease or disorder which in the opinion of the Investigator may jeopardize the subject's safety or compliance with the protocol.

HEALTHY SUBJECT CRITERIA

1. Pregnancy or Lactation: For women of childbearing potential, there is a requirement for a negative urine pregnancy test.
2. Any history or evidence of renal insufficiency, adrenal insufficiency, liver disease or anemia.
3. A history of cerebrovascular disease or coronary artery disease (or angina) regardless of the time since occurrence.
4. Congestive heart failure, New York Heart Association (NYHA) any class.
5. Diagnosis of 1st, 2nd or 3rd degree heart block or any arrhythmia judged by the investigator to be exclusionary.
6. Any condition which, in the opinion of the investigator, makes it difficult to engage in vigorous physical activity.
7. Any active infection.
8. Severe peripheral arterial disease characterized by ischemic rest pain or severe claudication.
9. Active alcohol abuse, substance abuse, or severe mental illness (as judged by the principal investigator).
10. Active malignancy, except basal cell or squamous cell skin cancers.
11. Major surgical operation within 30 days prior to screening.
12. Seizure disorder.
13. Bleeding disorder, or treatment with warfarin.
14. Use of any chronic medications.
15. Use of an investigational drug within 30 days prior to screening.
16. Any reason the principal investigator deems exclusionary.

Minimum Eligible Age

21 Years

Maximum Eligible Age

45 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes