Question

Why do you get dizzy when exhaling with resistance?

Answer 1

• Final answer:
• Exhaling with resistance can lead to dizziness due to an imbalance in gas exchange and stimulation of the vagus nerve, which affect oxygen and carbon dioxide levels and blood pressure.
• Step-by-step explanation:
• When you exhale with resistance, you are intentionally narrowing the airways, which increases the effort required to push air out of your lungs. This increased effort against resistance is related to the formula F = ΔP/R, where F is the flow rate, ΔP is the pressure difference, and R is the resistance. This increase in resistance causes more collisions of air molecules with the walls of the airway, which can result in a decreased flow of gases and can lead to a temporary imbalance in gas exchange between the air in your lungs and your bloodstream. When the exchange of oxygen and carbon dioxide becomes less efficient due to this altered flow, it can lead to a sensation of dizziness as your body reacts to the altered levels of these gases. Additionally, the effort needed to exhale against resistance can stimulate the vagus nerve, which can also cause dizziness by initiating a reflex that affects your heart rate and blood pressure.