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ObesityNCT06579508

Effects of High-intensity Exercise With Hypoxia and Taurine Supplementation on Metabolic and Mitochondrial Parameters

A study testing Cycle ergometer in people with Obesity, run by University of Sao Paulo at 2 sites in Brazil.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The prevalence of obesity in Brazil is one of the highest in Latin America. As an inflammatory disease, obesity needs to be treated, and one of the best interventions is exercise. This research aims to learn more about the effects of combining high-intensity training, recovery hypoxia, and taurine supplementation. Read more about this study

Who is it for?
Ages 25 to 45 years, women onlyHealthy volunteers can take part
Conditions the study is for
Obesity
What is being tested?
Cycle ergometer
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
50 participants
Where
2 sitesBrazil
Study dates
1 Mar 2025to Dec 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 25 to 45 years
  • Women only
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Women
  • Age between 25 - 45 years old;
  • BMI between 30 - 35kg/m²;
  • Not be on a diet;
  • Not be on a physical activity program;
  • Not be menopaused.

Who cannot join

  • Smokers;
  • Alcoholics;
  • Use thyroid medication;
  • Carry out nutritional monitoring or in treatment for weight loss;
  • Hypertension;
  • Metabolical syndrome;
  • Have any comorbidity associated to obesity;
  • Drugs use.

Trial locations and contacts

2 sites in 1 country.

Brazil2 sites
  • University of São Paulo, School of Physical Education and Sports of Ribeirão Preto.

    Ribeirão Preto, São Paulo, 14049-900

  • University of São Paulo, School of Physical Education and Sports of Ribeirão Preto

    Ribeirão Preto, São Paulo, 14049-900

Other trials in Brazil

About this study

Official title: Effects of High-intensity Intermittent Exercise With Recovery Hypoxia and Taurine Supplementation in Women With Obesity on Metabolic and Mitochondrial Parameters

The prevalence of obesity in Brazil is one of the highest in Latin America. As an inflammatory disease, obesity needs to be treated, and one of the best interventions is exercise. This research aims to learn more about the effects of combining high-intensity training, recovery hypoxia, and taurine supplementation. To better understand these effects, the researchers will compare hypoxia and normoxia, as well as taurine and placebo, with all participants training in the same way. The researchers will also investigate mitochondrial respiration and food consumption to connect certain aspects of obesity with overall health.

Read the detailed description

Obesity is characterized by a chronic inflammatory state, often linked with elevated oxidative stress and mitochondrial dysfunction. While physical exercise can trigger inflammatory responses due to muscle damage, it also promotes significant bodily adaptations, particularly in body composition, physical fitness, and skeletal muscle tissue, including enhanced mitochondrial dynamics. Moderate hypoxia, when combined with exercise, further amplifies these benefits by increasing the expression of genes related to mitochondrial biogenesis, GLUT1 expression, and angiogenesis. Previous findings suggest that high-intensity physical activity not only improves cardiorespiratory capacity and alters body composition but also significantly elevates inflammation. Consequently, taurine, a supplement known for its anti-inflammatory properties and ability to reduce oxidative stress, should be considered to mitigate these issues and optimize the benefits of exercise and hypoxia. Based on these premises, it is hypothesized that the combination of taurine supplementation with physical training under recovery hypoxia may reduce the significant rise in pro-inflammatory cytokines, thereby enhancing the potential benefits of exercise and moderate hypoxia.

Conditions
Obesity
Being tested
Cycle ergometer
Keywords
Mitochondrial disfunction, Oxidative stress, Inter-effort Hypoxia, Physical Exercise, Obesity
Medical subject headings
Obesity, Motor Activity

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Cycle ergometerOther

    Also called Bike

    The initial part will last 5 minutes at low intensity, corresponding to "easy" by the RPE.

    The main part will be performed at the intensity of training zone 3 (100-110% of the Lan), lasting 5 minutes with a rest of 2.5 minutes between exercises. The intensity will be controlled by HR and RPE.

    The final part will last 3 minutes at low intensity, corresponding to "easy" by the RPE.

    The load progression occurred during the first four weeks, starting with 3 sets and adding 1 set per week.

    The intensity of each effort is 100-110%HRAnTh.

Study groups in NCT06579508
Study groupRoleWhat they receive
ControlNo interventionNo intervention, only the evaluations will be done.
Normoxia - PlaceboPlacebo comparatorHigh-intensity interval cycle ergometer train, with inter effort normoxia (FiO2 = 21%).
Receives: Other: Cycle ergometer
Normoxia - TaurinaPlacebo comparatorHigh-intensity interval cycle ergometer train, with inter effort normoxia (FiO2 = 21%).
Receives: Other: Cycle ergometer
Hypoxia - PlaceboPlacebo comparatorHigh-intensity interval cycle ergometer train, with inter effort hypoxia (FiO2 = 12%).
Receives: Other: Cycle ergometer
Hypoxia - TaurinaExperimentalHigh-intensity interval cycle ergometer train, with inter effort hypoxia (FiO2 = 12%).
Receives: Other: Cycle ergometer

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Anthropometry - Height

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Height measured in meters.

    Measured: 12 weeks

  2. Anthropometry - Weight

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Changes in body weight in kilograms (kg).

    Measured: 12 weeks

  3. Anthropometry - BMI

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Changes in body mass index (BMI = weight measured(kg) / (height (m)²).

    Measured: 12 weeks

  4. Body composition - Free-fat mass

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Changes in body composition for fat-free mass (grams and %).

    Measured: 12 weeks

  5. Body composition - Fat mass

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Changes in body composition for fat mass (grams and %).

    Measured: 12 weeks

  6. Body composition - Bone

    Dual energy x-ray absorptiometry (DEXA) will be use for:

    Changes in body composition for bone mineral content (g.cm²).

    Measured: 12 weeks

  7. Lipid profile - Cholesterol

    Quantified by Total Liquiform Cholesterol Kit, HDL Cholesterol Kit and Liquiform Triglycerides Kit, from Labtest diagnóstica®, using an enzymatic system and absorbance spectrophotometer:

    Changes in total cholesterol (mg/dL).

    Measured: 12 weeks

  8. Lipid profile - Triglycerides

    Quantified by Total Liquiform Cholesterol Kit, HDL Cholesterol Kit and Liquiform Triglycerides Kit, from Labtest diagnóstica®, using an enzymatic system and absorbance spectrophotometer:

    Changes in triglycerides (mg/dL).

    Measured: 12 weeks

  9. Lipid profile - HDL/LDL

    Quantified by Total Liquiform Cholesterol Kit, HDL Cholesterol Kit and Liquiform Triglycerides Kit, from Labtest diagnóstica®, using an enzymatic system and absorbance spectrophotometer:

    Changes in HDL-cholesterol and LDL-cholesterol (mg/dL).

    Measured: 12 weeks

  10. Lipid profile - Glucose

    Quantified by Total Liquiform Cholesterol Kit, HDL Cholesterol Kit and Liquiform Triglycerides Kit, from Labtest diagnóstica®, using an enzymatic system and absorbance spectrophotometer:

    Changes in blood glucose (mg/dL).

    Measured: 12 weeks

  11. Inflammatory profile - pro inflammatory

    Changes in serum levels of cytokines will be evaluated with MILLIPLEX® Kit. Pro- inflammatory citokines: IL-6, TNF-α (pg/mL).

    Measured: 12 weeks

  12. Inflammatory profile - anti inflammatory

    Changes in serum levels of cytokines will be evaluated with MILLIPLEX® Kit. Ant- inflammatory citokines: IL-10 (pg/mL), Adiponectin (ng/mL).

    Measured: 12 weeks

  13. Aerobic performance - HRAnTh

    Physical tests performed pre-, after 6 weeks and post- intervention to assess aerobic physical fitness by incremental test in cycle ergometer. The test aim to evaluate:

    Anaerobic threshold (AT) using heart rate (HR).

    Measured: 12 weeks

  14. Aerobic performance - IAnTh

    Physical tests performed pre-, after 6 weeks and post- intervention to assess aerobic physical fitness by incremental test in cycle ergometer. The test aim to evaluate:

    Anaerobic threshold (AT) using intensity in Watts (W).

    Measured: 12 weeks

  15. Aerobic performance - RPEAnTh

    Physical tests performed pre-, after 6 weeks and post- intervention to assess aerobic physical fitness by incremental test in cycle ergometer. The test aim to evaluate:

    Anaerobic threshold (AT) using Rate of Perceived Effort (RPE).

    Measured: 12 weeks

  16. Aerobic performance - LacAnTh

    Physical tests performed pre-, after 6 weeks and post- intervention to assess aerobic physical fitness by incremental test in cycle ergometer. The test aim to evaluate:

    Anaerobic threshold (AT) using lactate concentration [lac-].

    Measured: 12 weeks

  17. Aerobic performance - VO2

    Physical tests performed pre-, after 6 weeks and post- intervention to assess aerobic physical fitness by incremental test in cycle ergometer. The test aim to evaluate:

    VO2peak in ml.kg-1.min-1.

    Measured: 12 weeks

  18. Food Intake

    A food record of three non-consecutive days: two days of the week and one day in the weekend. This evaluation will last 12 weeks. Will be evaluated with Dietwin® software (São Paulo, Brazil):

    The macronutrients, micronutrients and fiber in quilocalories and percentage (%)

    Measured: 12 weeks

  19. Food quality

    The feed will undergo analysis through the NOVA Classification. By NOVA, food will be classified into four groups: Group 1 - Unprocessed or minimally processed foods; Group 2 - Processed culinary ingredients; Group 3 - Processed foods; Group 4 - Ultra-processed foods.

    For each category, the total calories ingested will be calculated, and later, represented in percentage (%) the participation of each food group in the general diet.

    Measured: 12 weeks

  20. Taurine rates

    The participants will supplement 3g of taurina or placebo during 12 weeks. The rate of plasmatic taurine (mmol) will be evaluated during pre and post intervention.

    Measured: 12 weeks

  21. Muscle biopsy - RNA

    After biopsy the tissue will be treated for:

    qPCR analysis.

    Measured: 12 weeks

  22. Muscle biopsy - Protein

    After biopsy the tissue will be treated for:

    Western blotting analysis.

    Measured: 12 weeks

  23. Muscle biopsy - Mitochondria

    After biopsy the tissue will be treated for:

    High-resolution respirometry of muscle fibers analysis.

    Measured: 12 weeks

Secondary outcomes (4)
  1. Training measures - RPE

    The Borg scale will be use to quantify the:

    Rate of Perceived Effort (RPE) - will be noted after each effort during all the training program.

    Measured: 12 weeks

  2. Training measures - TRIMP

    The internal load will be calculated using TRIMP:

    Calculated multipling the RPE for the time in effort (TRIMP = RPE * time in effort), for each participant and training session.

    Measured: 12 weeks

  3. Training measures - SP02

    The Oxygen saturation (SpO2) will be measure in percent (%), using a pulse oximeter.

    SpO2 (%) will be noted after the end of the effort, the lowest point during the rest and in the end of the rest.

    Measured: 12 weeks

  4. Training measures - HR

    The heart rate (HR) will be measure in beats per minute (BPM) with Polar clock.

    Measured: 12 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted30 Aug 2024
  2. Study start1 Mar 2025
  3. Primary completionJul 2026 (estimated)
  4. Study completionDec 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Randomized clinical trial
Masking
Single blind
Who is masked
Participant
Enrolment
50 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06579508
Sponsor's protocol ID
Hypoxia_Taurine
Status last verified
May 2025
First submitted
20 Aug 2024
Last updated
11 May 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Cycle ergometer in people with Obesity, run by University of Sao Paulo at 2 sites in Brazil.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 11 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in Brazil. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Anthropometry - Height (time frame: 12 weeks). The study lists 23 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 May 2026.

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