What is the normal respiratory rate for an adult at rest?

The normal respiratory rate for an adult at rest is typically between 12 and 20 breaths per minute. This range is established based on physiological standards and reflects the average rate of ventilation in a healthy adult. It indicates a balance between adequate oxygen intake and carbon dioxide elimination, which is essential for normal body function.

When respiratory rates fall below this range, such as in the 8-12 breaths per minute category, it may suggest bradypnea, which can be indicative of respiratory depression or underlying health issues. Conversely, rates exceeding 20 breaths per minute can indicate tachypnea, often seen in conditions like anxiety, respiratory distress, or fever. Thus, maintaining a respiratory rate within the 12-20 breaths per minute norm is crucial for optimal health and ventilation.