Proponents of cycle syncing in the US say it can help women lose weight and build fitness. The idea is to change exercise based on shifts in hormones.
How to Cycle Sync your Workouts - Christina Carlyle
Tailoring workouts to your menstrual cycle may help your physical fitness – but only if done properly
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Cycle Syncing: How to Adapt Your Training to Your Menstrual Cycle
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Cycle Syncing Workouts: What Are They?
The truth about cycle syncing and exercise
How To Sync Your Workouts With Your Menstrual Cycle
How To Hack Your Body: Menstrual Cycle Syncing Exercise & Workouts – Nourished Natural Health