An article in PopularScience.com by Rachel Feltman claims that adults who soak in a bathtub regularly are less stressed, depressed and prone to anger than those who only take showers.  Furthermore baths improve circulation and improve sleep.

To enjoy optimum sleep benefits you should have a bath 60 to 220 minutes before bedtime, in water only pleasantly warm, not too hot.  The warm water boosts blood circulation to hands and feet, which in turn kick-starts the cooling of the body’s core that naturally occurs during sleep. A bath puts your body on the right trajectory, “cuing your brain to chill out and let you sleep”.

My take: Yes, fine, but I don’t think baths can have much effect on depression.  Stopping watching the political news on television would do the job quicker.