A Life of Greatness

Dr. Stacy Sims (Part 1): Understanding Hormones, Supplements & Exercise

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Nov 3, 2025
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INSIGHT

Hormones Pulse, Not Plateau

  • Hormones are messenger compounds that pulse throughout the day rather than remaining at steady levels.
  • Circadian rhythm, stress, age and training all change hormone pulses and their effects on the body.
ADVICE

Train According To How You Feel On Your Period

  • Exercise during your bleed phase according to how you feel rather than following blanket rules.
  • If you feel capable, training can be effective because inflammation is lower and tissue-building capacity is higher.
ADVICE

Time Iron Around Your Bleed

  • If you supplement iron, take it every other day starting the first day of your bleed to maximize absorption.
  • Avoid daily dosing to prevent downregulating iron absorption mechanisms like hepcidin.
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