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Rapamycin extends mouse lifespan 9–14%
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Why I Changed My Mind on Saunas — Whalespan

Content›Video›Why I Changed My Mind on Sau…

Why I Changed My Mind on Saunas

Paul Saladino6m · 2025-09-19

Claims Made

17

Claims Supported

7

Support Rate

41%

Support rate

7 of 17 claims supported

7 supported10 partial / not

Claims from this content

16

✓Well SupportedCold exposure is best performed first or on a separate day, but can be done at the end of a session if time is limited.✓Well SupportedTraditional Finnish saunas are preferred over infrared saunas because they feel better and are hotter.✓Well SupportedThe primary benefits of cold plunging are mental, including a post-plunge dopaminergic effect that leads to feeling more awake and a sense of calm.✓Well SupportedMitochondria use infrared light to produce melatonin, which acts as a systemic antioxidant, and lack of infrared light exposure is damaging.Partially Supported

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A. Volkovreader

4h

Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

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N. Park

2d

Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

◐

Sauna use may help stabilize heart rate variability during the luteal phase.

✕Not SupportedOverusing sauna when experiencing high allostatic load may negate net benefits.

✓Well SupportedContrast therapy combining sauna and cold plunge may offer neurochemical benefits promoting clarity and peace.

◐Partially SupportedCold plunges can increase dopamine and catecholamines, but their long-term impact on recovery and potential for overstressing the body should be considered.

✕Not SupportedIndividuals with pre-existing heart conditions may face risks when transitioning rapidly between hot and cold environments.

◐Partially SupportedSauna or hot tub use may indirectly lower blood pressure by impacting hypercortisolemia in individuals with high stress levels.

◐Partially SupportedLongevity benefits observed in Finnish sauna studies might be due to saunas providing the primary form of exercise for sedentary individuals.

?Limited ResearchSauna may offer unique benefits for detoxification, but its benefits for longevity are questionable if one is already highly active.

◐Partially SupportedSaunas can provide a workout-like benefit for sedentary individuals by inducing a physiological stress response without physical exertion.

✕Not SupportedCold plunges set to 34°F (1.1°C) may overstress the body long-term, whereas 52°F (11.1°C) is preferred.

◐Partially SupportedHigh allostatic load and overtraining can lead to decreased HRV.

◐Partially SupportedSweating is valuable for human detoxification, but overuse of saunas or cold plunges should be avoided.