Type 1 Diabetes
Conditions
Keywords
exercise, eccentric exercise, hypoxia, type 1 diabetes
Brief summary
Exercise plays an important role in treatment of diabetes. In recent years exercise training in normobaric hypoxia is used in training programs for athletes and in rehabilitation and also commercially. The aim of the study is to assess the impact of eccentric training conducted in conditions of normobaric hypoxia or normoxia and creatine supplementation on metabolic control: profile and stability of glucose concentration, HbA1c value, hypoglycemia and insulin demand, as well as the level of muscle strength, VO2max and anthropometric parameters
Detailed description
People with type 1 diabetes benefit from training in normobaric hypoxia - the composition of the air in the training room is: 15.4% oxygen 84.7% nitrogen, which corresponds to hypoxia at an altitude of 2,500 m above sea level. Hypoxia leads to the production of the hypoxia-inducible transcription factor HIF-1, which is a regulator of the expression of many genes responsible for angiogenesis, muscle hypertrophy and glucose stability. Before starting the10 - week training program all participants will undergo preliminary examination by a cardiologist during which echocardiography and ECG will be conducted. Then the incremental exercise test and muscle strength test will be performed to determine aerobic capacity (VO2max) and select individual weights to train for each participant. Patients enrolled to the study will be randomly assigned to one of the following 2 groups (training under normoxia or hypoxia conditions) and subgroups (with and without supplementation of creatine). Randomization will be carried out in blocks of 4 people. Training sessions will take place with the assistance of a personal trainer in the Hypoxia Laboratory and the Muscle Strength and Power Laboratory of Academy of Physical Education in Katowice twice a week for 60 minutes for a period of 10 weeks. The subjects will complete the same eccentric training program with individually selected weights. Within whole training period glucose level will be monitored via Flash Glucose Monitoring system (Free Style Libre2). During training sessions concentration of asprosin, irisin, GH, IGF-1 within blood serum immediately before and afrer the first and last training will be assessed. At baseline and after 10 weeks blood count, ALT, AST, creatinine, GFR, HbA1c, ACR (albumin/creatinine ratio) in a random urine sample, body weight, BMI, waist-hip circumference, body composition, quality of life according to the EQ-Worksheet questionnaire, daily insulin requirement, incremental exercise test, muscle strength test (1RM) will be investigated among all participants.
Interventions
BEHAVIORALhypoxia
eccentric training program conducted within normobaric hypoxic chamber
BEHAVIORALnormoxia
eccentric training program conducted within normoxic conditions
DIETARY_SUPPLEMENTcreatine supplementation
5g of creatine per day
DIETARY_SUPPLEMENTno creatine supplementation
no creatine supplementation
Sponsors
Silesian Centre for Heart Diseases
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
20 Years to 45 Years
Healthy volunteers
No
Inclusion criteria
* type 1 diabetes of at least 10 years duration, * low physical activity, * BMI:20-31 kg/m2, * treated with multiple insulin injections (at least 4 daily) or insulin pump (continuous subcutaneous insulin infusion \[CSII\]), * negative ECG exercise test, * HbA1c ≤ 8,0%, * high knowledge about functional insulin therapy, carbohydrate counting and diabetes management during exercise, * experience in use of FreeStyleLibre2 (Flash Glucose Monitoring System, Abbott), * Informed consent to participate in research signed by enrolled subjects
Exclusion criteria
* HbA1c \> 8,0%, * advanced complications of diabetes \[pre-proliferative or proliferative retinopathy, and previous laser therapy, microalbuminuria or overt nephropathy, autonomic neuropathy (including lack of elevated heart rate during physical activity)\], * patients physically active (regular physical activities more than once a week), * positive ECG exercise test, * history of cardiovascular event or coronary heart disease
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Metabolic control of diabetes | before and after 10 weeks | HbA1c (%, mmol/mol) |
| Time in range | before and after 10 weeks | TIR- percentage of time with blood glucose in a target range: 70-180 mg/dl (%) |
| Time below range | before and after 10 weeks | TBR - percentage of time with blood glucose levels\<70 mg/dl (%) |
| Maximum oxygen consumption (VO2max) | before and after 10 weeks | measured during incremental exercise test |
Countries
Poland
Contacts
Primary ContactMarta Wróbel, MD,PhD
Backup ContactPaula Nowocień, MD
Outcome results
None listed