Belly breathing, also known as diaphragmatic breathing or deep breathing, is a type of breathing exercise that engages the diaphragm, which is a muscle situated horizontally between the thoracic cavity and the abdominal cavity. When you perform belly breathing, the diaphragm contracts and moves downward, creating more space in the chest cavity for the lungs to expand. This action allows for a greater volume of air to be inhaled, leading to deeper and more efficient respiration. As the diaphragm contracts and the chest cavity expands, the belly also rises, which is why it's often referred to as "belly breathing."
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