You’re in a crowd somewhere and large, 64-year-old dude begins to yell antagonistically at you from across the room. You try to be cool and ignore him but your adrenal glands automatically squeeze their juices in response. Your body prepares for fight or flight by increasing heart rate, respiration, and diverting blood flow to the muscles by restricting blood flow from other parts of the body such as digestion and higher brain function.

[ Note: This “BE UNSTOPPABLE” graphic is not an ad, as you’ll see below. ]

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