Why do you yawn during exercise sometimes?
Show answer & explanation
Answer: To cool down your brain
To cool down your brain ✓ — Correct! Recent research suggests yawning helps cool the brain, which can get warmer during exercise. Deep inhalation may also improve airflow, but the primary function is thermoregulation.
To signal boredom with the workout — Wrong. While boredom can cause yawning in sedentary contexts, during exercise it's more likely a physiological response to increased brain temperature, not a sign of disinterest.
To stretch your jaw muscles — Wrong. Yawning does involve jaw stretching, but that's not the primary reason it happens during exercise. The main purpose is brain cooling, not muscle stretching.