List of terms of lung size and activity

Following are terms that specify a type of lung size and/or activity. More specific definitions may be found in individual articles.

• Eupnea - normal breathing
• Apnea - absence of breathing
• Bradypnea - decreased breathing rate
• Dyspnea or shortness of breath - sensation of respiratory distress
• Hyperaeration/Hyperinflation - increased lung volume
• Hyperpnea - fast and deep breathing
• Hyperventilation - increased breathing that causes CO₂ loss
• Hypopnea - slow and shallow breathing
• Hypoventilation - decreased breathing that causes CO₂ gain
• Labored breathing - physical presentation of respiratory distress
• Tachypnea - increased breathing rate
• Orthopnea - Breathlessness in lying down position relieved by sitting up or standing
• Platypnea - Breathlessness when seated or standing, relieved by lying flat
• Trepopnea - Breathlessness when lying flat relieved by lying in a lateral position
• Ponopnea - Painful breathing