She got the promotion. She built the business. She earned the degree, the title, the seat at the table. And somewhere beneath all of it, she’s still undermining herself. That contradiction sits at the heart of Darby Bonomi’s work as a sport and performance psychologist, and it is the driving question behind her new book.
In Unshrinkable, Darby draws on thirty-five years of clinical and performance psychology experience to examine a pattern she has observed across hundreds of high-achieving women: the quiet, persistent habit of self-undermining that runs beneath visible success. The book is not a motivational pep talk. It is a practitioner’s examination of why capable women shrink and what the path out looks like.
What Performance Psychology Reveals About Self-Sabotage
Darby spent two decades as a clinical psychologist, psychoanalyst, and faculty member at the San Francisco Psychoanalytic Institute before shifting her focus to performance psychology in 2016. That transition gave her a unique lens. Clinical work taught her how the mind creates invisible barriers. Performance psychology showed her how those barriers play out under pressure, in competition, and in professional settings where the stakes are high and the margin for self-doubt is razor-thin.
Her clients are competitive equestrians, entrepreneurs, and professionals around the world, most of them women who are accomplished by any external measure but privately stuck in cycles of self-criticism. They minimize their wins. They overwork to justify their place. They apologize for wanting more. Darby recognized these patterns early in her performance psychology practice because she had seen them so many times before, and because, as she writes candidly in the book, she had lived them herself.
The Hidden Patterns Behind Playing Small
Unshrinkable identifies specific patterns that Darby believes keep high-achieving women trapped in self-diminishing cycles. She names them directly: “good girl” conditioning that rewards compliance over ambition, a fear of being perceived as too much, and an addiction to perfection that masquerades as high standards but actually functions as self-punishment.
These are not abstract concepts in the book. Darby illustrates each pattern through stories drawn from her work with real clients, as well as her own experiences. The result is a book that reads less like a clinical manual and more like a frank conversation with someone who has spent decades listening to women describe the same invisible ceiling from different angles.
What makes Darby’s approach distinct is that she does not frame the problem as something wrong with the individual woman. The patterns she describes are responses to cultural conditioning, absorbed over years and reinforced by environments that reward women for shrinking. Performance psychology, in her view, is not about fixing people. It is about helping them see the programming that runs beneath their choices so they can make different ones.
Where Clinical Depth Meets Performance Psychology
Darby’s background gives her a different entry point than many voices in the performance space. Most performance psychology practitioners come from a sports or coaching background. Darby came from deep clinical training in psychoanalysis, where the work is slow, layered, and focused on the unconscious patterns that shape behavior. When she moved into performance psychology, she brought that depth with her.
That combination shows up throughout Unshrinkable. The book does not offer quick tips or five-step frameworks. It asks readers to sit with uncomfortable questions about who they have been performing for and why. Darby is direct about the fact that the work is not easy, but her writing suggests that the discomfort of honest self-examination is far less damaging than the slow erosion of living beneath your own capacity.
Darby is also an actively competing equestrian, a detail that matters more than it might seem. The sport demands a specific kind of mental discipline, the ability to perform under pressure while managing fear, self-doubt, and the unpredictability of working with a living animal. Her personal experience in competition informs her professional work in ways that pure academic training would not.
Who Unshrinkable Was Written For
The book speaks to women who have achieved visible success but privately feel the weight of self-imposed smallness. Darby has described her audience as women who are determined not to shrink under their own self-criticism or the expectations of others. They are not looking for affirmation. They are looking for an honest account of why the internal experience does not match the external one.
Darby’s writing has appeared in Practical Horseman, USHJA In Stride, The Chronicle of the Horse, The Plaid Horse, Eventing Nation, and Psychology Today. With Unshrinkable, she brings her performance psychology perspective to a broader audience, applying the same observational rigor she uses with her clients to a cultural pattern that affects far more women than her practice could ever reach individually.
For women who have spent years earning their place and still catch themselves apologizing for taking up space, Darby’s work offers something rare: a psychologist who names the pattern without sugarcoating it, and who believes the answer is not to try harder but to stop shrinking.
