Cortisol & Adrenals
Navigating Stress - Pausing Your Adrenals & Balancing Your Cortisol
Why am i so tired?
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Fight-or-Flight Response
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If your brain classifies the stimulus as a threat, then your autonomic nervous system kicks in - it’s “autonomic” as it’s not within your conscious control.
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Deep in your brain, there’s a small region known as the hypothalamus. One of its main roles is to trip the “fight-or-flight” response when it senses danger. Then it tells your nervous system to secrete the main hormones - norepinephrine and epinephrine (also known as adrenaline). These hormones work inside your brain to increase your heart rate, increase blood flow to your muscles so you can fight harder or run faster.
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They also tell your liver to dump stored glucose into your blood for the quick energy you will need to deal with the threat and increase your mental alertness. The result is rapid heart rate, sweating, muscular tension and hyper-alertness.
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Meanwhile, your pituitary gland is secreting ACTH, another hormone that travels through your blood to your adrenal glands. Your adrenals are located just above your kidneys, one on each side of your spine. Your adrenals pump more norepinephrine and adrenaline into your blood, along with the stress hormone cortisol.

Love-Hate Relationship with Cortisol
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