Epinephrine and exercise
Epinephrine and exercise
Imagine you're getting ready to race. The stress you feel makes your brain signal the adrenal glands to produce epinephrine or "adrenaline". Adrenaline increases your heart rate. As a result, more oxygen gets to your muscles. That makes your body ready to react. In a longer-term response to stress, the glands secrete cortisol. Cortisol promotes the release of energy, making you ready to race.
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