Why 50% of Girls Quit Sport (and How to Stop It)

In part two of the conversation with Dr. Julia Casadio, the team explores why so many adolescent girls leave sport during their teenage years and how coaches, parents, and support teams can better respond. Julia explains how female puberty affects performance, injury risk, confidence, menstrual health, fueling, and enjoyment, while emphasizing that many girls simply need better education, patience, and practical support. The episode highlights the work of Her Strength, including coach education, menstrual cycle awareness, training load adjustments during growth spurts, and simple nutrition tools such as PFC eating: protein, fat, and carbohydrate at each meal.Key TakeawaysTwo out of three girls are lost to sport during the teenage years, making adolescence a crucial intervention point.Female puberty can temporarily disrupt performance through growth, changes in body composition, wider hips, injury risk, periods, and hormonal fluctuations.Coaches should avoid treating adolescent girls as smaller versions of boys; their physical and psychological needs can be very different.A rapid growth spurt combined with a sudden training-load increase is a major injury-risk red flag.Menstrual health is a key marker of overall health, not an inconvenience to ignore.Missing periods, severe pain, heavy bleeding, or not having a first period by age 15 should be investigated.Male coaches can still create safe, supportive environments by normalizing conversations and making period products available.When performance plateaus, coaches can shift focus toward skills, strength, nutrition, recovery, and confidence rather than only results.PFC eating — protein, fat, and carbohydrate at each meal — gives young athletes a simple framework for better fueling.Keeping girls in sport requires practical behavior change, not just awareness.Her Strength - Dr. Julia CasadioDr. Paul LaursenPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab