Sauna and hot spring studies report different lipid findings across age groups
A review reports cholesterol reductions in younger study populations and no statistically significant lipid changes in older populations, without establishing that age explains the difference.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Hot spring and sauna use may improve some cholesterol measures in younger study populations, while trials in older populations did not detect significant lipid changes. That pattern does not establish that the therapies work differently because of age. The abstract also does not show whether any laboratory changes translated into fewer cardiovascular events.
The abstract gives no effect sizes, confidence intervals, treatment durations, or control descriptions. It does not report a direct statistical comparison of effects between age groups, and the expert recommendation for younger adults was weak.
What researchers found
Blood lipid measurements
Younger-adult trials reported lower total and LDL cholesterol; older-adult trials found no significant lipid changes. Comparator conditions and assessment timeframes are not reported in the abstract.
What was reviewed
The review considered hot springs and saunas used alone or alongside exercise. Its question concerned blood lipid profiles, so the abstract does not provide a direct test of broader cardiovascular protection.
Interpreting the age pattern
The age categories describe study populations using their mean ages. A significant finding in one category and a nonsignificant finding in another cannot, by themselves, demonstrate an age-dependent treatment effect.
The original publication
Hot spring and sauna use for improving blood lipid profiles: A systematic review and expert consensus on efficacy and recommendations.
Yamasaki S, Tokunou T, Kashiwado Y et al.
Complement Ther Med · 2025
- PubMed ID
- 40914321
- Record checked
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