How Your Birth Control Affects Your Period (And What That Means for Your Running)
Your pill, shot, or IUD does more than prevent pregnancy—it also alters your cycle.
RED-S
The Timing of Your Period Could Predict Your Injury Risk
A new study provides more incentive to keep tabs on your cycle.
Are You Eating Enough? Here Are 5 Signs You Might Not Be
And how it is sabotaging your training.