Krystal “Krys” Weisberg didn’t set out to become a leading voice in the fitness world. In fact, at 14, she was told by doctors to avoid intense physical activity due to her rare vascular condition. But after years of working in the fast-paced New York City nightlife industry—and feeling the toll, it took on her health—Krys decided it was time for a major life reset. That decision led her to a yoga class in Morristown, New Jersey, which inspired her to take a completely new life direction.

What began as a step toward personal healing evolved into a mission to help other women feel strong, empowered, and capable. Krys became a certified fitness instructor, built a devoted community, and created the FLK Method—her signature fitness philosophy that treats being “fit” as a mindset, not a clothing size. She’s since taught over 5,000 classes, coached more than 1,000 women, and even trained beauty mogul Bobbi Brown.

Krys’s message is simple: show up, breathe, and believe you can. With a candid, no-nonsense approach and an emphasis on community-driven accountability, she’s helping women reimagine fitness on their own terms. Whether she’s leading Bikini Bootkamp or cheering on hundreds through her free monthly challenges, Krys is proof that strength isn’t about perfection—it’s about persistence.