Why do you get a 'runner's high'?
Show answer & explanation
Answer: Brain releases endorphins
Leg muscles send pleasure signals — Wrong. Muscles don't generate pleasure signals—they can only signal fatigue and pain. The euphoric feeling comes from the brain releasing endorphins.
Muscles produce adrenaline — Wrong. Adrenaline comes from adrenal glands, not muscles. While it does increase during exercise, endorphins create the 'high.'
Brain releases endorphins ✓ — Correct! Prolonged exercise triggers your brain to release endorphins—natural painkillers that create euphoria. This helped our ancestors run long distances while hunting. It's nature's reward system!