Why do you yawn during exercise sometimes?
Show answer & explanation
Answer: Brain needs more oxygen
Brain needs more oxygen ✓ — Correct! Intense exercise can trigger yawning as your brain demands more oxygen. Yawning deeply expands lungs, increases blood oxygen, and may cool the brain. It's actually a sign you're working hard!
Muscles are too relaxed — Wrong. During exercise, muscles are contracting, not relaxing. Yawning is about oxygen needs, not muscle tension.
Room temperature is warm — Wrong. Temperature can trigger yawning to cool the brain, but during exercise it's mainly about increased oxygen demand.