Fußbad

The classic foot bath is usually used before going to the sauna to warm your feet, because you shouldn't go to the sauna with cold feet. After sweating, it provides a pleasant cooling. Hard to imagine, but after a visit to the sauna, the foot bath actually supports the body in the cooling phase after sweating.
The water, which is around 40 ° C, is let into the pool at the most ankle-high. The blood vessels in the skin, which have contracted and narrowed after cooling with water, expand again through the foot bath and thus help the blood to flow better through the veins and the heat to be transported away better.

Hints:
No size and age restrictions
Image: Elypso