Have you ever wondered why it feels so good to sing in the shower? Or why turning up the radio up in the middle of a traffic jam and singing out loud can put you in a better mood?

Singing does something measurable to your body and brain, whether you are alone, harmonising in a choir, or singing with your friends at a karaoke bar.

Scientists have been interested in this “singers’ high” phenomenon for many years.

And a consistent picture is emerging from the evidence: singing can stimulate your hormones, quieten your nervous system, improve your immune system and boost your feeling of belonging, all at the same time.

Singing reduces stress

One of the most consistent findings is that singing has been shown to lower cortisol, the hormone most often associated with stress.

Several studies, using saliva samples taken before and after singing sessions, have found significant drops in cortisol in both solo and group singing, such as choir rehearsals.

Part of the explanation is biomechanical. The act of singing requires long controlled exhalation, similar to a breathing pattern (called pranayamic breathing) known to activate the vagus nerve.

The vagus nerve, which runs from the brainstem down into the abdomen, is........

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