The overall tone is enthusiastic, with commenters emphasizing the superior health benefits of hot water immersion supported by research, using words like 'better,' 'powerful,' and 'game changer,' which reflect strong agreement and interest. Their active sharing of related studies and practical advice demonstrates high engagement, and the consensus on health improvements suggests notable potential impact.
AgreementModerate agreement
Most discussions support the findings that hot water immersion provides superior thermoregulatory, cardiovascular, and immune benefits over saunas, indicating general consensus.
InterestHigh interest
Responses demonstrate high curiosity, with many references to specific health benefits, study details, and practical applications, showing strong engagement with the topic.
EngagementHigh engagement
The participants actively discuss the implications, compare methods, and share personal experiences or related research, indicating deep involvement.
ImpactModerate impact
The discussions highlight potential shifts in health practices, such as favoring hot baths over expensive saunas, showing recognition of meaningful health improvements.
Top posts
Most liked on X and Bluesky
RM
Roger Seheult, MD
@RogerSeheult · X
What is the best way for people with joint problems to exercise without the risk of injuring themselves or falling?
Hot Tubs: Cardiac output nearly DOUBLED! when halfway through a 45 minute bath at 104.9°F.
https://t.co/K7NLgmmqgn https://t.co/gXKNhwS2xV
Where do you lose the most sweat? Hot Tub (HWI), Sauna (TRAD), or IR sauna (FIR)?
Hot Tub was 104.9°F
Sauna was 150.8°F
IR Sauna was 113°F
https://t.co/K7NLgmmqgn https://t.co/hReagMtl4A
READ: @AJPRegu study finds a single bout of hot water immersion produces greater thermoregulatory, cardiovascular and immune responses compared to traditional or far infrared sauna: https://t.co/kO9wleJfxI #ArticlesInPresS https://t.co/eXzXciAG81
May 21, 2025 · 9 likes · 3 shares · 13,991 followersView post →
T
tune
@keisuke4713 · X
https://t.co/5cFjnruEKC
24歳前後
Oct 4, 2025 · 7 likes · 4 shares · 3,743 followersView post →
Roger Seheult MD compares data on hot tubs, traditional saunas, and infrared saunas, focusing on their effects on thermoregulation, cardiovascular, and immune responses, based on recent scientific research.
Recent research shows hot water immersion not only raises core body temperature more effectively than saunas but also leads to measurable improvements in inflammatory markers and immune cell activity, offering…
A new book by Dr. Lassi A. Liikkanen on Finnish Sauna will be published on September 25, 2025. It discusses distinct physiological responses to sauna use, referencing recent studies on thermoregulatory, cardiovascular…
This video introduces various science topics including heat therapy, immune responses, and more. It features discussions on passive heat therapy and its effects on thermoregulation, cardiovascular, and immune responses…
Dec 17, 2025 · 4 shares · 114 followersView post →
T
Tabatha
@araran100 · X
RT @keisuke4713: https://t.co/5cFjnruEKC
24歳前後
Dec 17, 2025 · 4 shares · 17,390 followersView post →
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fujikuro
@fujikurok · X
"We have demonstrated that hot water immersion leads to the greatest thermoregulatory, cardiovascular, and immune responses compared with both traditional and far infrared saunas in young, healthy adults."
https://t.co/LbUwKHG8og https://t.co/F9KrIxisPZ
@bryan_johnson what do you think about this ?https://t.co/zkffQKBPrJ, they point higher cardiovascular response and temperature increase on Hot Water Immersion compared to saunas. There might not be such a large study as on Dry saunas but if the effects are similar it's much more accessible!
@Brady_H @brian_drago_ I've always heard you sweat more in a hot tub:
"Hot water immersion gives you the most robust change in core temperature because you can't effectively dissipate heat as you can if you have contact with the air and you're sweating to cool the body."
https://t.co/Y8BMz2l0P8
Scientists compared the body’s acute responses to three types of passive heating and found that hot-water immersion was the most impactful method for raising core body temperature.
https://t.co/R90YDosRWh #HotTub #Sauna #HeatTherapy #HealthyAging #Immunity #CardiovascularHealth https://t.co/Xx59abY38z
Nov 11, 2025 · 5 likes · 1 share · 12,749 followersView post →
MW
Magnesium Girl - yin solutions for a yang world
@LocalRachel · X
@JacobEdwardInc @anymanfitness Hmmmm you could actually just have a hot bath then top it up to make it super hot (unless you specifically wanted the tissue modifying aspects of infrared light?)
https://t.co/dtrTO8zhpe
Oct 4, 2025 · 4 shares · 17,390 followersView post →
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tune
@keisuke4713 · X
https://t.co/5cFjnruEKC
24歳前後
Oct 4, 2025 · 7 likes · 4 shares · 3,743 followersView post →
MM
Matt Mickiewicz
@MattMickiewicz · X
Full study: "Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities"
https://t.co/riktx9RvvN
Aug 9, 2025 · 1 like · 18,027 followersView post →
MM
Mark A. McKenney
@MarktheSpaman · X
Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities ~ https://t.co/UMtNmO6NvS via @APSPhysiology
Aug 8, 2025 · 1 like · 26,746 followersView post →
旅T
旅人 tabito
@tabibito250 · X
ソース: American Journal of Physiology-Regulatory, Integrative and Comparative Physiology https://t.co/VZNbGHetCf
@PhilWhiteBooks @davidasinclair @foundmyfitness Bathtub is good. I use my kitchen thermometer.
There’s good data (in my take) on Japanese hot bathing & longevity instead of sauna.
https://t.co/sHEsZeeeqO
@DrShayanSen In the same thread, this research was just published that indicates hot water immersion 40.5c may be even significantly more powerful than sauna
https://t.co/xknGKT8J3z
Is a hot tub or sauna better for our health? APS members Jessica Atencio & @ChrisMinson say: Hot water for the win! It helps improve circulation & immune function. More:
• Newsweek https://t.co/vke06JJa5g
• Original research in @AJPRegu https://t.co/bQ9zzRgRpR
#ISpyPhysiology https://t.co/5K0FUsmvy2
Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities ~ https://t.co/UMtNmO6NvS via @APSPhysiology #sauna #spa #infrared
Been "immersing" myself in the heat exposure stuff recently:
★Not only is bathtub good enough. May be better!
★Immediate cardio-dynamic results are impressive
★You can likely feel confident using tub for your passive heat exposure.
@ChrisMinson
https://t.co/EGwJh5a0yk
Tip from @chriskresser ! Interesting is that hot water submersion beat sauna for best results here. Yes just 1 study but interesting. “Comparison of thermoregulatory, cardiovascular, & immune responses to different passive heat therapy modalities” https://t.co/1hzS7baBN7
What is the best way for people with joint problems to exercise without the risk of injuring themselves or falling?
Hot Tubs: Cardiac output nearly DOUBLED! when halfway through a 45 minute bath at 104.9°F.
https://t.co/K7NLgmmqgn https://t.co/gXKNhwS2xV
Where do you lose the most sweat? Hot Tub (HWI), Sauna (TRAD), or IR sauna (FIR)?
Hot Tub was 104.9°F
Sauna was 150.8°F
IR Sauna was 113°F
https://t.co/K7NLgmmqgn https://t.co/hReagMtl4A
Where do you lose the most sweat? Hot Tub (HWI), Sauna (TRAD), or IR sauna (FIR)?
Hot Tube was 104.9°F
Sauna was 150.8°F
IR Sauna was 113°F
https://t.co/K7NLgmmqgn https://t.co/qJ14sXbKhF
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 30, 2025 · 8 shares · 197 followersView post →
NP
Nitin Gandhi, M Pharm
@NitinGa35829582 · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 30, 2025 · 8 shares · 363 followersView post →
BG
Bill Gifford
@billgifford · X
There's endless debate over the health benefits of Finnish vs. infrared sauna — but in this study from @ChrisMinson's lab, "hot-water immersion" (a good old hot tub) beat them both. https://t.co/n3s247GgVS
More from that study:
HWI = hot water immersion
TRAD = traditional sauna
FIR - infrared sauna
https://t.co/rivyskS6cn https://t.co/ZrLEq1jHfJ
Jun 30, 2025 · 6 likes · 31,410 followersView post →
DP
Digital Health and Patient Safety Platform
@DHPSP · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 29, 2025 · 8 shares · 6,776 followersView post →
IT
International Natural Product Sciences Taskforce
@_INPST · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 29, 2025 · 8 shares · 10,282 followersView post →
SC
Science Communication
@ScienceCommuni2 · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 29, 2025 · 8 shares · 2,902 followersView post →
SI
Shashi Iyengar | Metabolic Health India®
@shashiiyengar · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 29, 2025 · 8 shares · 29,656 followersView post →
DP
Dr Richard Palmquist
@DrRPalmquist · X
RT @HealthyFellow: Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https:/…
Jun 29, 2025 · 8 shares · 4,748 followersView post →
JF
J P Fanton
@HealthyFellow · X
Hot tubs outperform #saunas in boosting blood flow & #immune power
https://t.co/g91ahpU7ME
Free, Full Paper: https://t.co/PM6FL6bfFG
@_atanas_ @_INPST @ScienceCommuni2 @DHPSP @ajwodecki @shashiiyengar @DrRPalmquist @Mindzatwork @siimland @Mangan150 @SBakerMD @AskDrShashank
Jun 29, 2025 · 20 likes · 8 shares · 25,968 followersView post →
DL
Debbie @ Genetic Lifehacks
@GeneticLifehack · X
This is an interesting study looking at the immune-boosting effects of sauna (traditional or IR) vs. a hot bath. Turns out a hot bath has more benefits for cardiovascular and immune health. Maybe I don't need an expensive sauna after all?
https://t.co/poQ0fF1lF3
Study: Hot Baths Improve Heart, Immune System Better Than Saunas
Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities
Journal: https://t.co/s75LYuz0ic
Press: https://t.co/vSvGe9eZXw @DrKristieLeong
Jun 29, 2025 · 2 likes · 4,914 followersView post →
DR
Dr. Eddie Ramirez
@EddieRDMD · X
Study: Hot Baths Improve Heart, Immune System Better Than Saunas
Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities
https://t.co/s75LYuz0ic @DrKristieLeong
Jun 29, 2025 · 2 likes · 4,914 followersView post →
Let's turn up the heat with this #OpenAccess #ArticleinPress, Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities (Jessica K. Atencio et al. @HphyUo):
https://t.co/xejkCXJPct
#thermoregulation https://t.co/GAkwyaKiYl
May 22, 2025 · 5 likes · 3 shares · 1,164 followersView post →
GE
Gregor Eichhorn
@greichhorn · X
RT @APSPhysiology: READ: @AJPRegu study finds a single bout of hot water immersion produces greater thermoregulatory, cardiovascular and im…
May 21, 2025 · 3 shares · 360 followersView post →
RR
Rauchelle Richey
@rerichey · X
RT @APSPhysiology: READ: @AJPRegu study finds a single bout of hot water immersion produces greater thermoregulatory, cardiovascular and im…
May 21, 2025 · 3 shares · 515 followersView post →
HL
HEaT Lab
@kiwiheatlab · X
RT @APSPhysiology: READ: @AJPRegu study finds a single bout of hot water immersion produces greater thermoregulatory, cardiovascular and im…
May 21, 2025 · 3 shares · 691 followersView post →
AS
American Physiological Society
@APSPhysiology · X
READ: @AJPRegu study finds a single bout of hot water immersion produces greater thermoregulatory, cardiovascular and immune responses compared to traditional or far infrared sauna: https://t.co/kO9wleJfxI #ArticlesInPresS https://t.co/eXzXciAG81
May 21, 2025 · 9 likes · 3 shares · 13,991 followersView post →
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Instituto Euro-Americano A.C. (@euro.gto) • Facebook
Facebook
... 10.1152/ajpregu.00012.2025) sobre el efecto en el cuerpo de entrar a tinas de agua caliente contra otras opciones como saunas tradicionales o modernas ...
Instituto Euro-Americano... - Instituto Euro-Americano A.C. - Facebook
Facebook
... 10.1152/ajpregu.00012.2025) sobre el efecto en el cuerpo de entrar a tinas de agua caliente contra otras opciones como saunas tradicionales o modernas ...