Using hot baths or saunas shouldn't be considered as a substitute for exercise. But they can mimic some of the health benefits.
Results of a recent global sauna survey suggest people use sauna to relax. But they don't necessarily know about the health benefits it's been shown to have.
Traditional sauna is just as good for you as infrared sauna, and might be more enjoyable. They key is understanding the differences and finding your own preference.
They provide more than warmth.
A hot bath burns calories, helps control blood sugar and keeps your blood vessels healthy. What's not to like?