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Conclusion was that hot tub raises core body temperature best

Honestly, 45 min in a 105 hot tub sounds like strait up torture.

As you have said, there is significant benefit to sitting in direct sunlight, hence  sanatoriums worked in 1918.  I frequently sit outside at 8600' in direct sunlight while fully clothed, IR wavelengths pass right through clothing.  I get hotter doing that than from my FIR sauna.  The benefits of direct sunlight are highly underrated.  Go outside and get some photons

As someone living in Sweden 151F is a warm room not a sauna. A decent sauna in Sweden will be at 194F(90C).

I wish someone would study the effects of hot yoga - I mean really hot yoga as in 105 degrees or higher. The postures further raise the core body temp. I always feel amazing after doing that

I've so appreciated your videos on this.  Between you and Dr. Rhonda, I was better able to identify the goal of all of this... increasing core temp, not just being in a sauna.  Once I realized it wasn't the sauna, but the increase in core temp, it let me approach this whole thing more flexibly.

During the pandemic, my ah ha moment was exactly this.  I couldn't go to a sauna and risk a covid infection.  Moreover, they were just shut down.  

Instead, I drew a HOT bath.  I got a waterproof meat thermometer, made sure the water was 110 deg F,  plugged in a space heater in the bathroom, and plunged in.  I would even add some essential oils like jasmine or lemongrass with some soft music.  I measured my temp throughout, waited til I got to 102 deg, stayed a bit longer, then got out.  Before starting the bath, I place some towels on my bed and pillow.  When I got out, I would just lay down and SWEAT.  It can take 20 minutes for it to really come down.

I've done this on vacation at hotels, when at friends or families homes (with their permission).  I have ADHD, and it's been great for my anxiety, focus, relaxation.  I always get through the day fine, but being a critical care nurse, dealing with people.... I come home full of adrenaline, yet I'm physically exhausted.  The heat really helps calm everything down.  Knowing I could do this anywhere I didn't have access to a sauna was very freeing.  

I still go to the gym and use the sauna.  But focusing on core temp, instead of the method you achieve it makes for a more flexible, more accessible experience.

Traditional sauna temp (measured) was too low. Should be at least 180F.

The sauna protocol used in this study is unfortunately not representative of traditional European sauna practices. In Germany, for example, saunas are typically taken at around 90°C—I personally frequent a Banja sauna at 94°C—and sessions commonly last for at least 15 minutes. Equally important is the resting period between sessions, which usually spans 20 minutes or more. This cooldown phase plays a crucial role in stimulating the release of dopamine and endorphins.

I hope future studies will consider using parameters that more closely reflect traditional European sauna practices, as this would likely yield more relevant and meaningful results for populations familiar with these customs.

In this study the time spent in a traditional sauna is very short. The time I spend in a sauna, of course with pauses is 2 hours or more twice every week witha measured temperature of 80 C (176 F) or slightly more. I am from Sweden and have visited a sauna for more than 50 years. I combine the sauna with a cold showers or going out into the snow when avaible

Timestamps with summary would add to your nice videos ❤

I sit for ten minutes in a 45 degree C bath every night and use an infra red lamp if there is no sun on any given day. Not had any respiratory infections since 2019!

Dr. Seheult,
I wanted to share a clinical observation from my 30+ years as a registered nurse in emergency medicine:
• Experience: Over 30 years as an ER nurse.
• Observation: Tylenol (acetaminophen) can cause hypotension in some patients.
• Clinical Scenario:
• Patients presented with fever and borderline low blood pressure (around 110 systolic).
• I expressed concern about giving Tylenol due to risk of further lowering BP.
• ED physician insisted on administering Tylenol.
• Outcome:
• After Tylenol, BP dropped below 90 systolic despite IV fluids.
• Both patients required hospital admission.
• In my opinion, without Tylenol, they likely would have been discharged.
• Concern: This possible adverse effect of Tylenol in borderline hypotensive patients may be under-recognized.
Thank you for your attention to this important issue.
Sincerely, Michael RN,CCRN,CEN

They spend no where near enough time in the sauna. My heart rate goes much higher in the sauna compared to hot tub.

I feel the study didn’t take in controlling temperature factor. Hot tub, FIR and traditional sauna was all different temperatures, the FIR being the lowest in temperature.

In conclusion more studies are needed.

Täällä Suomessa suosimme tietenkin perinteistä saunaa. Perinteinen sauna lämpenee puulla, nykyään saunat pääosin lämpenee sähkökiukaalla. Suomessa jokaiseen taloon kuuluu sauna. Terveiset täältä Suomesta 🇫🇮

I believe that one of the reasons people prefer red light sauna is the sauna lights effects on serotonin versus the actual physical effects.

Edgar Cayce the Sleeping Psychic  in the 1920- 40' stated via trance  a hot bath of 104 f  would be very helpful to certain sicknesses and general health. When i was in my 30"S i for flues almost every year and later i began hot bath 104 degrees - Next day i felt rather bad but the day after i was totally renewed and the flue more less was gone - normally they lasted a week - also i added a full cup of Epsom salt to the bath - just one bath and the flue was done !

Was out working in my yard at 90F with a heat index of 95F, was drenched in sweat, probably the same as a sauna.