Snapshot

58% of runners: luteal phase defect

From The Diary Of A CEO with Steven Bartlett · May 8, 2026

Health & Fitness

Most Replayed Moment: This Is The Best Exercise Protocol Fo… · May 8, 2026

58% of female runners have a luteal phase defect, meaning the second half of their menstrual cycle is compromised, likely due to relative energy deficiency.