Fueling for a Sub-3 Marathon: Laura Filla on Ferritin, Nutrition, and a Breakthrough Marathon
About this episode
Coach Laura Filla shares her journey to completing a sub-3 marathon while managing health and personal challenges.
What does it take to reach sub-3 with your period intact and your body well-fueled? That's the question Coach Laura Filla can now answer from experience. After four years, ten marathons, low ferritin, grief, a coaching business, and two kids, Laura crossed the finish line at Bayshore 2026 in 2:58:43. Host Heather Caplan, RDN, sits down with Laura to talk through the whole arc: what changed, what didn't, and why the breakthrough finally came when she stopped white-knuckling her training and started thriving through it. Laura Filla is a marathoner, mom, RRCA Level 2 Certified Running Coach, and ACE Certified Personal Trainer. She founded Filla Endurance in 2021 with a focus on helping runners get the best out of themselves in a way that supports their long-term health. She's also a Lane 9 Directory coach. Chapters 03:58- Laura's first marathon and what made her want to go faster 08:20- When sub-3 first felt possible: the 3:06 breakthrough at Indianapolis 12:31- What people don't see behind a fast marathon time 13:52- Fueling in the early seasons and working with a dietitian for the first time 17:58- Navigating grief, setbacks, and a ferritin of 14 19:32- How low ferritin showed up…
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