Hormones, Birth Control, and Performance: What Every Woman Should Know
Chelsea Espe • September 5, 2025

Join us for a special seminar with Tierra Duncan — CF-L3, long-time 12 Labours CrossFit coach, and upcoming author of The Birth Control Illusion: Reclaiming Hormones, Health, and Your Cycle (early 2026).
In this 60-minute talk, Tierra will break down how hormones, training stress, and fueling directly impact women’s performance and recovery. You’ll learn:
- Why your menstrual cycle is a vital performance signal
- How stress and recovery shape strength and longevity
- The fueling strategies and key nutrients every female athlete needs
- What to know about birth control and its impact on training
This seminar will help you connect the dots between your hormones and your training so you can make informed choices that support both performance and long-term health.
Info:
Date: October 25, 2025
Location: 12 Labours CrossFit Columbia
Time: 10:30-11:30
Price: $25 / members
$35 / non-members
To sign up email chelsea@the12labours.com
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