Insulin is like the watchman who stores the sugar, adrenaline is the sudden shout that makes you jump, and thyroxine is the steady fire for your body's engine. Without enough, you get sugar sickness, no fight-power, and everything slowing down like a parched field. But I'll tell you, for an athlete, too *much* adrenaline before a race is the real disease—it locks your legs stiff. I know, because my gold medal loss in the 400m came from a panic so thick I forgot my own starting block.
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