Mary Cain, the Bronxville-born former track prodigy who founded Atalanta NYC, is turning a hard, unflinching spotlight on youth sports in her new memoir, This Is Not About Running, due out April 28. The book follows Cain’s arc from a middle-school phenom to a Nike-sponsored athlete and the physical and emotional toll she says followed. Now back in the sport and pursuing medicine, Cain frames the memoir as both a personal reckoning and a call for safer coaching and tighter medical oversight.
Inside the memoir
Cain writes in a voice that is blunt one moment and wry the next, revisiting the public revelations that first brought her story to national attention and expanding them into a longer narrative about power, control, and recovery. As reported by Publishers Weekly, the book, out April 28 from Mariner Books, mixes first-person storytelling with practical takeaways aimed at parents and coaches. Reviewers say it combines painful detail with the kind of clear-eyed reporting that has pushed running communities to question how young athletes are managed and protected.
What she says happened
Cain alleges that staff at the Nike Oregon Project pressured her to lose weight and normalized training through injury, which she connects to a diagnosis of relative energy deficiency in sport (RED-S) and multiple stress fractures. “I broke five different bones,” Cain has said of that period, according to coverage of her account. As GBH/NPR reported in 2019, her disclosures helped trigger scrutiny of the Oregon Project and fueled a broader conversation about medical supervision for elite youth athletes.
From prodigy to med student
Today, Cain has shifted gears. She is enrolled at Stanford School of Medicine and underwent surgery in March 2023 for functional popliteal artery entrapment (FPAES), a procedure she later turned into a research project with her surgeon. Stanford Medicine profiles her as a medical student studying the condition and how it affects athletes’ return to sport. That progression from teenage star to patient to researcher shapes much of the memoir’s later chapters.
Building something different in New York
Back home in New York, Cain founded Atalanta NYC, a nonprofit pro running team that also mentors high-school girls in underserved neighborhoods. The group’s press materials highlight community programs and even a Times Square/Nasdaq appearance as part of its public-facing work. Cain is also listed as a board director at The Athlete Survivors’ Assist, which centers survivor-led advocacy in sports. In the book and in related press, both organizations are presented as concrete attempts to address the problems she lays out.
Legal fallout
In 2021, Cain filed a $20 million lawsuit alleging emotional and physical abuse by coach Alberto Salazar and failure of oversight by Nike. The case was reported settled in late 2023. As covered by The Guardian, the terms of the settlement were not disclosed, closing a high-profile chapter while leaving bigger questions about industry culture and accountability unresolved.
Why this matters locally
Cain told the New York Post she hopes the memoir will help families and athletes recognize warning signs in youth sports and push for better medical and coaching safeguards. Atalanta NYC, a New York-based effort that pays professional women to mentor local girls, is held up as a homegrown example of how the sport might start to change from the ground up, while the memoir supplies the personal case study driving that conversation.
What’s next
This Is Not About Running hits shelves April 28, and Cain is scheduled for a conversation and signing at WBUR CitySpace on April 30, an event listed on WBUR’s events page. For New Yorkers watching debates over athlete welfare and youth sports, the book arrives as a sharp, personal look at where sponsorship, coaching, and medical oversight collide, and what could be done differently.
