Influences of short-term normobaric hypoxic training on metabolic syndrome-related markers
| ISRCTN | ISRCTN11583600 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN11583600 |
| Protocol serial number | - |
| Sponsor | University of Ulsan |
| Funder | University of Ulsan |
- Submission date
- 18/08/2017
- Registration date
- 25/08/2017
- Last edited
- 24/08/2017
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Nutritional, Metabolic, Endocrine
Plain English summary of protocol
Background and study aims
Hypoxic training involves training while breathing hypoxic (low oxygen) air. Although not commonly used, hypoxic training may be beneficial for people with clinical conditions such as coronary artery (heart) disease and chronic obstructive pulmonary (lung) disease. However, the effects of hypoxic training vary greatly according to the oxygen level, exercise intensity, time and duration, and also vary considerably among individuals. The aim of this study is to examine the effects of hypoxic training on factors related to metabolic syndrome (a combination of diabetes, high blood pressure and obesity).
Who can participate?
Men aged 18 or over
What does the study involve?
Participants are divided into two groups based on their body mass index. Participants in the overweight and normal-weight groups are then randomly allocated into either the hypoxic exercise group (hypoxic overweight and hypoxic normal-weight) or the normoxic exercise group (normoxic overweight and normoxic normal-weight). Participants perform treadmill exercise three days per week for four weeks under either hypoxic (low oxygen) or normoxic (normal oxygen) conditions, for 50 minutes (including 5 minutes warm-up and cool-down periods) after a 30-minute rest period. Markers of metabolic syndrome are measured using blood sampling at the start and the end of the study.
What are the possible benefits and risks of participating?
These results may show that hypoxic training could be useful for improving arterial (blood vessel) stiffness, circulatory system function, body composition and metabolism in adult men.
Where is the study run from?
Gifu University (Japan)
When is the study starting and how long is it expected to run for?
March 2014 to May 2015
Who is funding the study?
University of Ulsan (South Korea)
Who is the main contact?
Dr Sohee Shin
Contact information
Public
School of Exercise and Sport Science
University of Ulsan
93 Daehak-ro, Nam-gu
Ulsan
44610
Korea, South
Study information
| Primary study design | Interventional |
|---|---|
| Study design | Interventional randomised controlled trial |
| Secondary study design | Randomised controlled trial |
| Study type | Participant information sheet |
| Scientific title | Influences of short-term normobaric hypoxic training on metabolic syndrome-related markers in overweight and normal-weight men: a randomised controlled trial |
| Study objectives | Short-term normobaric hypoxic training influences metabolic syndrome-related markers in overweight and normal-weight men positively. |
| Ethics approval(s) | Institutional review board of the Gifu University School of Medicine, 06/03/2013, ref: 24-392 |
| Health condition(s) or problem(s) studied | Metabolic syndrome |
| Intervention | Forty-one Japanese men were included and were divided into two groups based on their body mass indexes (BMIs): BMI ≥25 or BMI <25. Participants in the overweight and normal-weight groups were randomised into the hypoxic exercise group (hypoxic overweight, HO; hypoxic normal-weight, HN) or the normoxic exercise group (normoxic overweight, NO; normoxic normal-weight, NN). Subjects performed treadmill exercise three days per week for four weeks at an exercise intensity of 60% maximum heart rate (HR), under either normobaric hypoxic or normobaric normoxic conditions, for 50 min (including 5 min warm-up and cool-down periods) after a 30-min rest period. Duration of follow-up: 4 weeks. |
| Intervention type | Other |
| Primary outcome measure(s) |
Metabolic syndrome-related markers, measured using blood sampling at baseline and 1 month |
| Key secondary outcome measure(s) |
Body composition, measured using body composition analyzer (TANITA Co., Tokyo, Japan) at baseline and 1 month |
| Completion date | 30/05/2015 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | Adult |
| Lower age limit | 18 Years |
| Sex | Male |
| Target sample size at registration | 40 |
| Key inclusion criteria | 1. All patients admitted to one of the participating wards 2. Aged 18 years or over 3. Able to provide informed consent to participate |
| Key exclusion criteria | 1. Coronary heart disease 2. Cardiac insufficiency 3. Pulmonary disease 4. Uncontrolled hypertension |
| Date of first enrolment | 30/03/2014 |
| Date of final enrolment | 30/08/2014 |
Locations
Countries of recruitment
- Japan
Study participating centre
Results and Publications
| Individual participant data (IPD) Intention to share | Yes |
|---|---|
| IPD sharing plan summary | Available on request |
| IPD sharing plan | The datasets generated during and/or analysed during the current study are/will be available upon request from Dr Sohee Shin. |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Participant information sheet | Participant information sheet | 11/11/2025 | 11/11/2025 | No | Yes |
