The BBC website has an article detailing ‘why breathing like a baby might help reduce your stress levels’ featuring Rebecca Dennis and the Breathing Tree Workshops. Here’s an excerpt:

“It’s about remembering how we used to breathe when we were babies and toddlers.”

Breathing expert Rebecca Dennis runs ‘breathing sessions’ to help people manage their stress. She observes that many of the people who attend her sessions use their neck and shoulders when taking in a breath, whereas “babies’ breath always starts in their belly”.

Rebecca recommends returning to that youthful model by embracing the “mothership of all breathing muscles”: the diaphragm.