The Food Medic

Ask Dr. Hazel Wallace: Can Your Menstrual Cycle Sync with Your Friends? Exploring Menstrual Synchrony

Jun 11, 2025
Dr. Hazel Wallace dives into the intriguing concept of menstrual synchrony, unraveling myths and examining its biological basis. She discusses the negative impact of fasted exercise on menstrual health, stressing the importance of energy availability. The conversation also covers tailored nutrition and exercise strategies for managing PCOS, including a balanced view on hormonal contraceptives. Dr. Wallace offers practical advice for improving menstrual health while promoting her new book, which serves as a comprehensive guide to understanding menstrual cycles.
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INSIGHT

Menstrual Synchrony Myth

  • Menstrual synchrony, where cycles align with friends or roommates, is mostly a myth according to modern research.
  • Cycle timing variability and chance better explain why periods might seem to sync up.
ADVICE

Avoid Fasted Exercise for Cycles

  • Avoid fasted exercise if you notice menstrual irregularities; it can disrupt cycles and cause loss of periods.
  • Fuel early workouts with a small carb snack like a banana or toast to maintain energy and cycle health.
ADVICE

Holistic PCOS Management

  • Manage PCOS holistically with nutrition, exercise, sleep, and stress management alongside possible pill use.
  • Focus on balanced carbs, strength training, and lifestyle to improve insulin resistance and PCOS symptoms.
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