What happens to your heart rate and breathing rate when reading books?

When reading books, your heart rate and breathing rate typically decrease, reflecting a state of relaxation and focus. Engaging in reading can activate the parasympathetic nervous system, which promotes calmness and reduces stress. However, if the content is particularly thrilling or suspenseful, heart rate and breathing may temporarily increase due to excitement or anxiety. Overall, reading generally promotes a more tranquil physiological state.