Single infrared sauna session for blood sugar control in adults with overweight
The Effects of an Acute Sauna Session on Glucose Control in Individuals at Risk for Metabolic Impairments
This tests whether a single 40-minute infrared sauna session before a meal can lower post-meal blood sugar and improve 24-hour glucose control in adults who are overweight.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 15 (estimated) |
| Ages | 30 Years to 55 Years |
| Sex | All |
| Sponsor | University of Prince Edward Island Academic / other |
| Locations | 1 site (Charlottetown, Prince Edward Island) |
| Trial ID | NCT07520929 on ClinicalTrials.gov |
What this trial studies
The trial uses a randomized crossover design in which each participant completes two lab visits: one with two 20-minute infrared sauna exposures (175°F / 79°C, separated by a 5-minute break) and one with quiet seated rest, separated by at least 72 hours. Participants wear a continuous glucose monitor (CGM) and have baseline and repeated measurements of blood pressure, heart rate, and oral temperature; standardized meals are provided and activity is limited. After each condition participants consume identical meals at home and glucose responses over the day are compared between conditions. A familiarization sauna session is completed before the experimental visits to ensure participant tolerance.
Who should consider this trial
Good fit: Ideal participants are adults aged 30–55 with BMI ≥27 kg/m2 and central obesity (waist >102 cm for men or >88 cm for women) who do not have diabetes or cardiovascular contraindications and do not regularly use saunas.
Not a fit: People with diagnosed diabetes, those taking medications that affect blood sugar, individuals with heart problems or low blood pressure, pregnant people, or regular sauna users are unlikely to benefit or be eligible.
Why it matters
Potential benefit: If successful, a single pre-meal infrared sauna session could reduce post-meal glucose spikes and modestly improve daily glucose patterns, offering a low-effort option for people with overweight.
How similar studies have performed: Some small studies of repeated heat therapy suggest improvements in insulin sensitivity and metabolic markers, but evidence that a single sauna session meaningfully alters glucose responses is limited.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: Are 30-55 years old Have a body mass index of ≥ 27 kg/m2 Have a waist size \>102 cm (men) or \>88 cm (women) Have access to transportation for the 2 experimental visits (e.g., car, public transit, or drop-off). Are cleared for participation based on the Physical Activity Readiness Questionnaire (PAR-Q+). Exclusion Criteria: Take medications that affect blood sugar Exercise intensely 2+ times/week Have diabetes, heart issues, low blood sugar or pressure Are pregnant Regularly use saunas or other heat therapy 1+ times/week
Where this trial is running
Charlottetown, Prince Edward Island
- University of Prince Edward Island — Charlottetown, Prince Edward Island, Canada (Recruiting)
Study contacts
- Principal investigator: Etienne Myette-Cote — University of Prince Edward Island
- Study coordinator: Etienne Myette-Cote, PhD
- Email: emyette-cote@upei.ca
- Phone: 9025660756
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.