Loading clinical trials...

Exercise Detection Study | Clinical Trials | Clareo Health

COMPLETEDNA

Exercise Detection Study

Testing and Tuning a Multiparameter Exercise Detection Algorithm

NCT02688218•Oregon Health and Science University

Summary

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.

Detailed Description

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 The investigators most recent inpatient study, as yet unpublished, shows that adjusting insulin and glucagon delivery during closed loop treatment, after announcing exercise, effectively reduces mean time below a glucose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.

Eligibility

Age

21 - 45 years

Sex

ALL

Healthy Volunteers

Yes

Inclusion Criteria

•TYPE 1 DIABETIC SUBJECT 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.
+9 more criteria

Locations (1)

Oregon Health and Science University

Portland, Oregon, United States

Key Dates

Start Date

February 1, 2016

Primary Completion Date

February 2, 2018

Completion Date

February 2, 2018

Last Updated

July 29, 2019

Enrollment

ACTUAL participants

Conditions

Type 1 Diabetes

Interventions

Aerobic Exercise

BEHAVIORAL

Resistance Exercise

BEHAVIORAL

Feasibility of a Tailored Online Self-compassion Intervention

NCT07051005

Type 1 Diabetes MellitusType 2 Diabetes Mellitus (T2DM)

View study

RECRUITINGNA

Aerobic vs Resistance Exercise in Post-menopausal Women With Type 1 Diabetes

NCT05188027

Type 1 DiabetesPost-menopause

View study

Data Source & Attribution

This clinical trial information is sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

ClinicalTrials.gov last update: July 29, 2019Data synced to Clareo: March 29, 2026

Modifications: This data has been reformatted for display purposes. Eligibility criteria have been parsed into inclusion/exclusion sections. Location data has been geocoded to enable distance-based search. For the authoritative and most current information, please visit ClinicalTrials.gov.

Neither the United States Government nor Clareo Health make any warranties regarding the data. Check ClinicalTrials.gov frequently for updates.

View ClinicalTrials.gov Terms and Conditions

Exercise Detection Study

Inclusion Criteria

Exclusion Criteria

Feasibility of a Tailored Online Self-compassion Intervention

Aerobic vs Resistance Exercise in Post-menopausal Women With Type 1 Diabetes

Dysautonomia in Children With Type 1 Diabetes

Artificial Pancreas Technology to Reduce Glycemic Variability and Improve Cardiovascular Health in Type 1 Diabetes

Lipoprotein Kinetics in T1D

Primary Care Pragmatic, Real World Experience for Automated Insulin Delivery