For Olympic medalist and New York City Marathon winner Shalane Flanagan, endurance runs in her blood. In September of 2021, she set out on an audacious goal to complete all 6 World Marathon Majors in just a 6-week span—a self-started challenge she called "Project Eclipse."To guide her along the 157.2-mile journey, Shalane teamed up with InsideTracker to take a data-driven, inside look into her body's performance and recovery. She knows how personalized nutrition contributes to achieving peak performance. She’s been testing her blood for over 20 years—and for this challenge, she leaned on InsideTracker to unveil personalized, science-backed recommendations on how she could maximize her endurance and optimize her recovery between marathons. In this video, we take a retrospective look back on “Project Eclipse” and dive deeper into the science that supported Shalane’s remarkable accomplishment. Using InsideTracker, she took blood tests before, during, and after completing the Marathon Majors to guide her down a personalized journey of discovery, optimization, nutrition, performance, and recovery. You'll hear the inside story from Shalane herself with complementary scientific analysis from the InsideTracker Science team—along with an unprecedented insight into the biomarker data and nutrition practices that fueled the pursuit of one of the world’s greatest distance runners.






















