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NCT Number: NCT07158047

Repeated Far Infrared Sauna Bathing in Adults With Obesity

This is a clinical trial to determine if 30 sessions of far infrared sauna bathing can improve cardiovascular and metabolic function in adults with obesity.

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Key information

Conditions

Obesity (Disorder) Body Temperature Changes Body Weight Glucose Metabolism Disorders Heat Stress Disorders Hyperinsulinism Hyperthermia Insulin Resistance Metabolic Diseases Nutrition Disorders Nutritional and Metabolic Diseases Obesity Overnutrition Overweight Pathological Conditions, Signs and Symptoms Signs and Symptoms Wounds and Injuries

Age range

18 year–59 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

About this study

Obesity can increase the risk for cardiovascular and metabolic diseases. Lifestyle interventions are needed to reduce this risk. Far infrared saunas are one form of heat therapy that may help reduce these risks, however, there is limited research within a population with obesity. It is hypothesized that repeated far infrared sauna bathing will improve cardiovascular and metabolic function in adults with obesity.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • BMI between 30-45 kg/m2

Exclusion criteria

  • Diagnosed diabetes
  • Greater than stage 2 hypertension
  • Coagulopathies
  • Allergies to lidocaine
  • Medications affecting blood pressure
  • Blood clotting, and blood sugars
  • Smoker
  • Pregnant
  • Desiring to become pregnant in the near future
  • Breastfeeding
  • BMI less than 30
  • BMI greater than 45 kg/m2
  • Exercising > 120 min/week
  • Taking medications (other than hormone contraceptives)
  • Not willing to stop taking medications (other than hormone contraceptives) for 24 hours before testing days

Treatment and study plan

heat therapy

Other

30 sessions of far infrared sauna bathing (45-60C) for up to 45 min

Other names: sauna bathing

Primary outcomes

  1. Blood pressure change

    Time frame: 10 weeks

    Change in systolic and diastolic blood pressures after 30 sessions of Intervention

  2. Blood glucose

    Time frame: 10 weeks

    Change in plasma glucose levels after Intervention

Secondary outcomes

  1. Arterial stiffness reduction

    Time frame: 10 weeks

    Change in Carotid-femoral Pulse Wave Velocity (m/s) after Intervention

  2. Serum insulin

    Time frame: 10 weeks

    Change in serum insulin levels after Intervention

Study contacts

Contact information is provided by the study sponsor or research team.

Christopher T Minson, PhD

CONTACT

[email protected]

541-346-7583

John R Halliwill, PhD

CONTACT

[email protected]

541-346-7591

Sponsors and collaborators

Lead sponsor

University of Oregon

Other

Registry information

Official study title

Targeting Hypertension and Insulin Resistance With Heat Therapy

Important dates

Study start
2022
Primary completion
2026
Study completion
2026
First posted
Sep 5, 2025
Registry last updated
Mar 4, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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